Fabricated and AI-Generated Viral Stories on r/AmItheAsshole and r/nosleep

Reddit's first-person narrative communities have long blurred the line between genuine accounts and fiction. r/AmItheAsshole (AITA) solicits real-life moral dilemmas and is widely treated as authentic by readers and by the news outlets and social-media accounts that repackage its posts — yet it is also widely understood to contain large volumes of fabricated 'creative writing' engineered to maximize engagement, with serial fabricators openly describing inventing viral posts. r/nosleep operates by an explicit convention that every story is to be treated as true, which makes it especially susceptible to fabrications passing as real experiences when they escape the subreddit's framing.

The arrival of accessible large language models sharply worsened the problem. A 2024 analysis by Originality.AI, which ran an AI-detection model on text posts of at least 100 words, estimated that AI-generated content in r/nosleep climbed from a low single-digit share in 2020 to roughly 41% of sampled posts in 2024 — a dramatic jump that mirrors broader concerns about machine-generated text flooding storytelling and advice communities. (The detection methodology has inherent error margins, but the trend direction is consistent across the sampled years.)

The stakes extend beyond Reddit. Fabricated and AI-written AITA-style stories are routinely scraped into TikTok and YouTube narration videos, aggregated by news outlets, and even used to train AI advice tools — meaning invented or synthetic narratives can be laundered into 'real' viral news and into datasets, degrading information quality far downstream.