What Is a Shadowban and Why Does It Matter?

And why are people so obsessed with them?
Andreas Rekdal
Senior Editor
May 11, 2021
Updated: June 15, 2022
Andreas Rekdal
Senior Editor
May 11, 2021
Updated: June 15, 2022

Less than 24 hours after a violent mob of Trump supporters stormed the United States Capitol this year, Facebook took the once-unthinkable step of banning the world’s most powerful elected leader from its namesake platform and its subsidiary, Instagram. In the following days, platforms like Twitter, YouTube, Reddit, Twitch, TikTok, Snapchat and Discord followed suit, banning a constellation of accounts and groups affiliated with the sitting president, or involved in the effort to spread misinformation about the 2020 presidential election.

To many, this was a welcome, if overdue, response to then-President Donald Trump’s efforts to undermine confidence in elections: 58 percent of U.S. adults supported the bans, according to Pew Research. But a number of high-profile Republicans spoke up in response, framing it as the latest ploy in an alleged conspiracy among tech companies to silence conservative voices.

What Are Shadowbans?

Shadowbans block a user or individual pieces of content without letting the offending user know they’ve been blocked.

Prior to this year’s influx of public bans, this censorship narrative was assembled around the concept of “shadowbans”: a moderation technique used to secretly block users from posting to a social platform. In conservatives’ telling, it is used in a targeted way to suppress political content Silicon Valley types disagree with.

To be clear, there’s no reason to believe this claim of political targeting. A 2021 report from the New York University Stern Center for Business and Human Rights, calls the idea that social media companies unfairly target conservatives “a falsehood with no reliable evidence to support it.”

The ongoing controversy surrounding shadowbans points to a tension inherent to any attempt at building a global community: Most of us want some kind of moderation, but opinions differ widely as to where lines should be drawn. And in moderation systems where everyone has something to be unhappy about, secrecy around their animating policies provides fertile ground for conspiracy theories to spread.

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What Are Shadowbans?

A moderation technique first popularized in bulletin boards and early web forums, shadowbans block users or individual pieces of content without letting the offending user know they’ve been blocked. To a shadow-banned user, the site continues to function as normal — they can still make posts and engage with other people’s posts — but to others, the user appears to have gone silent. 

“It’s as if they were Bruce Willis in The Sixth Sense, and they didn’t know they were dead,” said Duane Roelands, who moderated a bulletin board hosted on a Rutgers University server in the late 1980s and early 1990s.

“It’s as if they were Bruce Willis in The Sixth Sense, and they didn’t know they were dead.”

Predating the modern internet, that message board, Quartz BBS, was essentially a collection of chat rooms dedicated to specific topics, ranging from jokes to television shows and political debates — not unlike a Slack workspace or a Discord server. But the bulletin board, which Roelands accessed from his Commodore 64, only supported 10 concurrent users. The text-only rooms displayed posts in pure chronological order, and they maxed out at 200 posts, at which point old messages would get automatically deleted.

“So if a room suddenly erupted with conversation about a hot topic — an election or an important news event — what would happen is what we called ‘scrolling the room,’ where messages were leaving that 200-message window very quickly,” Roelands said. “Often in the case of a single day, or, with a very hotly contested topic, that scrolling could happen within an hour or even less.”

To keep those debates from getting needlessly ugly, Roelands and his fellow moderators would shadow-ban users, either temporarily or permanently, depending on the offense.

“Offensive behavior could be anything from simply being constantly abrasive and obnoxious, to being disruptive in a room devoted to serious topics like sexual orientation, gender identity or politics,” he said. “Our behavioral guidelines basically boiled down to, ‘Don’t be a jerk.’” 

On Quartz BBS, shadowbans tended to happen in waves, as groups of ill-behaved newcomers flooded the message boards every few months. Roelands and his fellow moderators would refer to the waves as “cicada season.”

While an explicitly banned user is likely to create a new account and keep posting, a shadow-banned user might conclude that other people just don’t care what they have to say. Over time, the thinking goes, they will lose interest and go away.

In that sense, shadowbans are just a technical implementation of a strategy long employed by forum users — “Don’t feed the troll!” — with the added benefit of not relying on users to exercise restraint.


engagement symbols shadowban
Image via Shutterstock.

How the Term ‘Shadowban’ Took on New Meaning

On traditional message boards, shadowbans are a clear-cut proposition: either your posts are blocked or they aren’t. And that approach makes sense when posts are served up chronologically. But modern social networks — which usually serve up content through algorithmically curated feeds — can achieve similar results through subtler means that limit certain users’ reach without blocking their content entirely.

One approach is to exclude a user’s posts from discoverability features. In 2017, a number of photographers, bloggers and influencers noticed substantial drops in engagement with their Instagram posts. At the time, “more than a dozen” Instagram users told tech reporter Taylor Lorenz that shadow-banned users’ posts weren’t showing up “in hashtag searches or on the Instagram Search & Explore tab.” 

Instagram didn’t tell these users what they’d done wrong, but Lorenz pointed to spammy hashtag usage and unauthorized automation tools as behaviors that likely triggered the changes. 

The same year, in a similar effort to make feeds less spammy, Instagram’s parent company, Facebook, deployed a machine learning model to identify and reduce the reach of people and pages who rely on “engagement bait.” Common examples of the genre include calls to “share with a friend who’s addicted to coffee,” “like if you support local coffee shops” and “tag someone you want to hang out with on our patio.”

In addition to limiting the reach of individual posts that employ the strategy, Facebook announced that it would “demote” repeat offenders at the page level.

“People would always find a way to follow the letter of the law while violating the spirit of the law.”

This machine learning model has since been expanded to include comments under posts. And in 2019, Facebook started flagging engagement bait in the audio content of videos as well. (R.I.P. “Don’t forget to like and subscribe!” It’s been real.)

According to Facebook’s own documentation, the platform does not tell publishers if their pages have been demoted, or why, citing concerns that users could rely on specific details to find workarounds — a concern that hearkens back to the early days of shadowbans.

“We figured out early on that if you clearly defined what was acceptable behavior and what was not, people would always find a way to follow the letter of the law while violating the spirit of the law,” Roeland told me. “This is a behavior that has persisted online to this day, and there’s never really been a good solution for it.”


Do These More Subtle Techniques Still Count as Shadowbans?

The Instagram bans reported by Lorenz in 2017 look quite different from traditional shadowbans from a technical perspective, but they also share important similarities. The strategy targeted accounts according to undisclosed criteria, and aside from a rapid drop in reach, users had no way to find out why, or even whether, they’d been affected by the platform’s decisions.

That secrecy seems to be the only real throughline among the techniques — real and imagined — that users refer to when they talk about “shadowbans.”

“Often, the term is being used to describe more subtle [strategies] described by social media companies as ‘downranking.’”

“I don’t think, when we hear the term [shadowban], it always means the same thing,” said Stephen Barnard, an associate professor at St. Lawrence University whose research focuses on the role of media and technology in fostering social change. “Often, the term is being used to describe more subtle [strategies] described by social media companies as ‘downranking.’”

Facebook’s effort to limit the spread of engagement bait is a typical example of downranking. In a Medium post published in March 2021, Facebook VP of Global Affairs Nick Clegg acknowledged that the News Feed also downranks content with exaggerated headlines (clickbait) as well as content from pages run by websites that “generate an extremely disproportionate amount of their traffic from Facebook relative to the rest of the internet.”

In cases where a platform publicly announces changes to its feed’s ranking algorithm, referring to the outcome as a “shadowban” feels like a bit of a stretch — though everyday users who don’t follow Facebook’s product blog may beg to differ. 

Demoting pages for being disproportionately successful at drawing Facebook traffic seems more shadowy at first glance, but the internal logic makes sense when you consider how news sites compete for eyeballs on social networks. If a story is true and its headline is accurate, a number of credible news outlets will quickly corroborate it. As a result, users will share multiple versions of the same story from different, competing outlets. Conversely, if a story relies on sketchy sourcing, or if its headline makes claims unsupported by the reporting, the article can become a permanent exclusive — the only link available for spreading the word. 

In the aggregate, therefore, a disproportionate reliance on viral Facebook hits over other sources of traffic may be a pretty good indicator that a site is willing to stretch the truth — although it’s certainly possible that legitimate publications may get caught up in the dragnet. 

And while the platform may not offer clear guidance on where the line is, exactly, most sites that veer into “extremely disproportionate” Facebook traffic territory probably know that they are, in fact, actively juicing the algorithm.

But social media companies also employ strategies that look even more like traditional shadowbans — with some important adjustments to account for how users engage with their platforms.

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social media icons shadowban
Image via Shutterstock.

Traditional Shadowbans Don’t Work On Modern Platforms

One key difference between a traditional messageboard and social networks like Instagram, Facebook or LinkedIn is the overlap between the user’s digital and “real life” social circles. If a message board user simply stops posting one day, you might not think too much of it. But if a close friend stops showing up in your social feeds, you might ask them why they’ve disappeared the next time you see them.

To help moderators slow the spread of offensive content and reduce the chance of backlash, Facebook’s moderation approach allows for blocked posts to remain visible to a user’s first-degree connections. So instead of tilting at windmills all by yourself, you can do so in an echo chamber of people just like you.

This strategy is laid out in a 2019 patent for a system that automatically identifies and hides offensive content in Facebook groups or on pages: “In one embodiment, the blocked comments are not displayed to the forum users. However, the blocked comment may be displayed to the commenting user and his or her friends within the social networking system. As such, the offending user may not be aware that his or her comment is not displayed to other users of the forum.”

“They don’t know what’s happened immediately. But they always find out.”

Reasonable people may disagree on whether this can be accurately described as a “shadowban” — and some have. In a discussion thread about Facebook’s patent, for example, Hacker News user NoodleIncident argued that the patented system is “nicer to the banned user than a shadowban” because the user’s friends can still see the comments. 

This might be a necessary concession to effectively keep the user from finding out about their status — the core idea of shadowbanning. And ultimately, it’s probably more effective, because, according to Roelands, users are smarter than shadow-ban proponents tend to give them credit for.

“When users are shadow-banned, they don’t know what’s happened immediately,” he said. “But they always find out.”


Why Do People Keep Talking About Shadowbans?

The fact that common moderation techniques depend on keeping users in the dark has no doubt played a big role in turning the term “shadowban” into a catch-all explanation for unexplained changes in social media performance — and a rallying cry for those who think tech companies are censoring them. 

In surveying users who experienced content moderation in the run-up to the 2016 election, Sarah Myers West, now a postdoctoral researcher at New York University’s AI Now Institute, found that many users saw correlations between what they referred to as online censorship and algorithmic intervention.

“My definition of content moderation might be: ‘Was a post, photo or video you posted taken down, or was your account suspended,’” West said. “But a number of folks would interpret content moderation as something like: ‘I lost a lot of followers and I don’t really have a good explanation for that — but I think this is an overt effort by someone at this platform to shut me down.’ Or: ‘My posts normally get a certain amount of engagement, but I posted about this topic, and all of a sudden my number of likes is negligible.’”

Social engagement can fluctuate for reasons that have nothing to do with censorship, of course. But West, who is also one of the conveners of the Santa Clara Principles on Transparency and Accountability in Content Moderation, said the opacity surrounding moderation systems and algorithmic feeds leave users speculating about how it all works.

“Users would develop their own folk theories to make sense of it.”

“Users would develop their own folk theories to make sense of it,” West said. “And those folk theories tended toward the political.”

One common theory among users was that social platforms deliberately aimed to suppress their points of view. Others believed their posts were actively sabotaged by other users making concerted efforts to flag posts for violating platform policies, in turn triggering mechanisms that limit a post’s reach. 

“And then some people were just genuinely perplexed,” West said. “They just really did not know or understand what was going on, and they just wanted an explanation of how they could modify their behavior in the future so they wouldn’t encounter this kind of issue.”

The lack of transparency is especially frustrating for those who depend on social platforms in their day-to-day lives. In her research, West spoke with people living with disabilities whose support networks existed primarily online. Some told her they feared losing access to these networks not just because they’d lose a way to socialize with other people, but because they relied on these platforms to check in on each other and to reach out if they needed help.

These users’ stories help to illustrate an important consideration when talking about content moderation: It has real-life implications.

Chris Stedman, author of IRL: Finding Realness, Meaning, and Belonging in Our Digital Lives, sees the debate over shadowbans as a symptom of a broader anxiety about the power social media platforms have over our means of self expression. 

That’s been especially true over the past year, as we’ve all come to rely on online platforms for much-needed social interaction. But for many, the distinction between social media and “real life” was fading away long before the pandemic.

“At one point, the internet was a discrete space that we could step into and out of. I have vivid memories of biking to the library as a kid and writing my name on a clipboard to use a shared computer. It was really set apart from the rest of my life,” Stedman said. “Now, a bigger and bigger part of what it means to be me — how I find a sense of connection and community and express myself — has moved into digital spaces.”


angry icon illustration shadowban
Image via Shutterstock.

Then ‘Shadowbans’ Got Weaponized

According to Google Trends, which measures the popularity of search terms over time, interest in shadowbans remained more or less flat from 2004 (the start of the data set) until April 2017 (when the Instagram shadowban controversy reported by Taylor Lorenz began picking up steam). But interest really started ramping up in 2018, following a Vice story that used the term to describe a bug in Twitter’s interface that prevented some conservative leaders from showing up as suggestions within its search feature. A subsequent tweet by President Trump called the mishap a “discriminatory and illegal practice.”

And the ring of the term itself probably added fuel to the fire.

“‘Shadowbanning’ sounds quite nefarious, and I think that is part of its success in the public discourse.”

“‘Shadowbanning’ sounds quite nefarious, and I think that is part of its success in the public discourse,” Barnard said. “It has this sense of a faceless entity, and it’s conspiratorial. It contains a more or less explicit assertion that these liberal tech executives from California are censoring us and conspiring to force their progressive agenda throughout American politics.”

In his view, the lack of insight into the inner workings of social networks play a role too — especially among conservatives, who tend to have a lower level of trust in media institutions. Together, these factors form a perfect storm where each social post that fails to gain traction becomes another piece of evidence of a broad-based effort at suppression, as opposed to just a failed attempt at going viral.

“It becomes a seemingly plausible explanation, of course ignoring all the ways these platforms are helping them spread their messages — which of course is the deep irony of all of this,” Barnard said.

And underneath it all is a kernel of truth: Social networks aren’t censoring conservatives on ideological grounds, but they are trying to limit the spread of misinformation — most notably about elections and about COVID-19. And among those most vocal in accusing social platforms of liberal bias are noted purveyors of misinformation on exactly those topics: Senator Josh Hawley, who raised his fist in solidarity with rioters outside the Capitol in January; Breitbart News, which was investigated by the FBI for its role as a vector for Russian propaganda in the 2016 election; Ben Shapiro, whose “censored” site The Daily Wire saw its social media engagement skyrocket last year.

In short, social platforms are stuck between a rock and a hard place. Downranking is essential to preventing the spread of misinformation, and offering too much transparency about automated moderation systems will make it easier for bad actors to circumvent them. At the same time, any secretive, large-scale moderation system is bound to cause frustrations — like those expressed by users in West’s study who said they didn’t know what they’d done wrong.

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What Will It Take for the Shadow-Ban Narrative to Go Away?

The term ‘shadowbanning’ has taken on a life of its own, evolving from a signifier of a specific moderation technique to shorthand for anything from actual downranking to unfounded conspiracy theories. And because most people learned about ‘shadowbans’ as the centerpiece of a bad-faith argument, it’s hard to see how the term could return to its original meaning. According to Google Trends, interest in shadowbanning as a topic reached an all-time high this January, and it continued to rise in February as well.

And on some level, maybe shadowbans were never all that great to begin with. Adrian Speyer, who is head of community at the forum software provider Vanilla Forums, urges users of his company’s platform to treat shadowbans as a last resort.

“If someone is not welcome in your community, you should escort them from the premises.”

“If someone is not welcome in your community, you should escort them from the premises,” Speyer said. 

In his view, shadowbans provide an easy way out of having difficult, but important conversations about community standards. These conversations can help foster a greater sense of ownership, and empower users to help moderators as they seek to uphold those standards.

Looking back on his time as a bulletin board moderator, Roelands has also come to see shadowbans differently. For one, because there’s no feedback loop directly related to a specific action, users are never given an opportunity to learn where they went wrong. But perhaps more importantly, because people could usually tell when a trouble-making user suddenly disappeared, it created an environment where otherwise-upstanding community members sought to publicly humiliate users who had been shadowbanned.

“It made our community meaner,” Roelands said. “It’s like the difference between restorative and retributive justice. Shadowbans won’t turn people into better members of the community.”

At any rate, social platforms are starting to recognize that opacity is a real problem. In his March Medium post, Clegg announced that Facebook’s roadmap for this year includes “providing more transparency about how the distribution of problematic content is reduced.”

Twitter is also rethinking its moderation policies with an eye toward increasing transparency. In late January, the company rolled out a new pilot program called Birdwatch that lets users annotate tweets they believe to be misleading. Users then vote on each other’s submissions, in a system that will be familiar to users of web forums like Reddit or Hacker News. 

Twitter will make all data contributed to Birdwatch available to the public, along with the algorithm the Birdwatch feature uses to determine which posts rise to the top.

At the time of this writing, the No. 1 post on Birdwatch was an exercise video posted by Republican Congresswoman Marjorie Taylor Greene with the caption: “This is my Covid protection 💪”. The current top note labels the post as “potentially misleading,” citing CDC guidance on COVID-19 prevention: “Exercise does not offer protection against COVID-19. Wearing a mask, staying socially distant, washing your hands, and getting vaccinated are the best ways to protect yourself and others.”

As far as warnings go, this label is more specific and actionable than the generic “This claim is disputed” tag rolled out during the vote count following the presidential election. But perhaps most importantly, the system gives end users an opportunity to set their own standards and give each other clear feedback on what’s in bounds and what isn’t.

These features are unlikely to solve the companies’ moderation problems for good. Facebook’s user base includes more than a third of the world’s population, which makes creating any agreed-upon set of community standards impossible. And an upvote-driven moderation system like Birdwatch could devolve into something resembling mob rule. 

But both social media giants seem committed to giving their users more insight into why posts are downranked or flagged.

And that’s a start, at least.

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