Check out this post on Lemmy that was obviously written using #ChatGPT and then 70+ people start talking with the author like it's a real conversation: https://europe.pub/post/9008804
#PieFed can detect AI posts so I just flag the author as a bot which warns all other https://piefed.social users. Compare the difference on the piefed.social copy of the discussion: https://piefed.social/post/1718730. See the little chip icon next to the name?