"bad faith"? As in, that the person posts the accusation while actually believing the opposite? I would think the far, far more common reason for posting that incorrectly is that they legitimately thought it was slop. Of course such low-effort wrongful accusations are bad to post for multiple reasons, but I don't think people frequently post such things falsely
The issue is that label has expanded to anything that's weird/unusual, and the consequences of being accused of AI are far more severe than the consequences of a false accusation so people do it frequently. It is absolutely a vector for harrassment/trolling.
One subreddit I follow now bans people if they make an accusation of AI-generation that's weak/disproven, which is a rule I like.
