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[ARTICLE · art-89097] src=arstechnica.com ↗ pub= topic=artificial-intelligence verified=true sentiment=↓ negative

AI isn’t enough to protect social media communities from AI

Reddit's revamped AI moderation tools erroneously removed dozens of comments and posts dating back 10 years from the r/AskHistorians community in April, according to moderators, who believe the tools mistakenly flagged content linking to the historical image-sharing website Rare Historical Photos as spam. Dr. Sarah Gilbert, a moderator of r/AskHistorians, said the deletions erased valuable information that users had spent hours or days researching and writing, and that the community views itself as an archive of detailed responses. Reddit has not responded to a request for comment.

read2 min views5 publishedAug 6, 2026
AI isn’t enough to protect social media communities from AI
Image: Arstechnica (auto-discovered)

Sometimes you have to fight fire with fire. But when it comes to AI slop and hateful content threatening the safety and value of social media platforms, adding more fire—in this case, more AI—can make the problem worse.

At its best, social media can be a haven for people who want to share their experiences and knowledge. It gets closest to this ideal when users contribute authentic, valuable content, whether that’s a uniquely thoughtful blog post or a helpful video on how to build a PC. Relying primarily on AI tools to preserve that authenticity misses what makes social media worthwhile in the first place: the people behind it.

Erroneous erasures #

In April, a Slack channel for moderators of the r/AskHistorians Reddit community was usually busy. The channel, which automatically receives links to modmail messages, was flooded with alerts after dozens of comments and posts dating back 10 years were automatically removed from the subreddit.

“And there was nothing we or the experts [who posted the deleted content] could do about it,” Dr. Sarah Gilbert, one of the mods, told me.

This was particularly damaging to the subreddit because its users view the community as an archive of detailed responses that continue to educate people long after content is posted.

Reddit’s recently revamped AI moderation tools were apparently responsible for the removals, the moderators believe. After recovering the text of some posts, one of AskHistorians’ mods noticed that all the removed content linked to Rare Historical Photos, a historical image-sharing website. The mods think Reddit might have designated the website—and thus any post using its content for explanatory illustrations—as spam.

Reddit has not responded to a request for comment.

The deletion of the content erased valuable information that had taken time to aggregate (Gilbert tells me some people spend hours, “sometimes over the course of days,” researching and writing responses to questions submitted to the subreddit). Yet it’s possible that those erroneous removals, and others like them, have contributed to metrics intended to demonstrate how effective AI modding is on Reddit.

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