AI generated content is just like plagiarism, you will find some users will reply on those thread (I could be one of them), mostly it's easy to detect, when a newbie create a wall of text post it's high likely using AI... but if the user have few merits, sometimes it's quite harder.
Can we have a feature where the AI generated content automatically get flagged as AI generated content
I don't think people will like it, it would be similar to like, dislike, emoji etc in social medias.
I mean if it's possible to make a patch where users get information about AI generated content then they may not waste their precious time in replying to such posts/thread which aren't written by a human but are generated by bots.
Probably if the content worth to discuss, it won't be deleted. Because there are many AI generated contents that still exist until now.