A Reddit post about a bride who demands a wedding guest wear a specific, unflattering shade is sure to provoke rage, let alone one about a bridesmaid or mother of the groom who wants to wear white. A scenario where a parent asks someone on an airplane to switch seats so they can sit next to their young child is likely to invoke the same rush of anger. But those posts may trigger a Reddit moderator’s annoyance for a different reason—they are common themes within a growing genre of AI-generated, fake posts.

These are examples that spring to mind for Cassie, one of dozens of moderators for r/AmItheAsshole. With over 24 million members, it’s one of the biggest subreddits, and it explicitly bans AI-generated content and other made-up stories. Since late 2022, when ChatGPT first launched to the public, Cassie (who wanted to be referred to by first name only) and other people who volunteer their time to moderate Reddit posts have been struggling with an influx of AI content. Some of it is entirely AI-generated, while other users have taken to editing their posts and comments with AI programs like Grammarly.

“It’s probably more prevalent than anybody wants to really admit, because it’s just so easy to shove your post into ChatGPT and say ‘Hey, make this more exciting,’” says Cassie, who thinks as much as half of all content being posted to Reddit may have been created or reworked with AI in some way.

r/AmItheAsshole is a pillar of Reddit culture, a format that has inspired dozens if not hundreds of derivatives like r/AmIOverreacting, r/AmITheDevil, and r/AmItheKameena, a subreddit with over 100,000 members described as “Am I the asshole, but the Indian version.” Posts tend to feature stories about interpersonal conflicts, where Redditors can weigh in on who is wrong (“YTA” means “You’re the asshole,” while “ESH” means “Everyone sucks here”), who is right, and what the best course of action to take is moving forward. Users and moderators across these r/AmItheAsshole variants have reported seeing more content they suspect is AI-generated, and others say it’s a sitewide issue happening in all kinds of subreddits.

“If you have a general wedding sub or AITA, relationships, or something like that, you will get hit hard,” says a moderator of r/AITAH, a variant of r/AmItheAsshole that has almost 7 million members. This moderator, a retiree who spoke on the condition of anonymity, has been active on Reddit for 18 years—most of its existence—and also had decades of experience in the web business before that. She views AI as a potential existential threat to the platform.

“Reddit itself is either going to have to do something, or the snake is going to swallow its own tail,” she says. “It’s getting to the point where the AI is feeding the AI.”