My thoughts on this are simple. If a user is assisted in making a post through artificial intelligence, instead of the user to pass it on as knowledge coming from themselves they should do the right thing and simply put at the footnote or references, source as artificial intelligence. Doing this without adding a source is tantamount to plagiarism. However if it is overdone by a user then the attention of the user needs to be called to it and they should be cautioned. We want to see original thoughts, ideas and write up not ai generated.
Except a user is using it as a reference to something, I don't think AI generated post should be used at all. I don't see any reason why somebody can use an AI to write a full post and then putting a link or stating that the post was AI generated makes it okay. I don't know if there's an expressive rule against it, but it doesn't make sense to me. It's different if you use an AI tool to correct your spelling, grammar or punctuation, but using an AI to generate a post is just wrong. It's not organic.
This is a discussion forum and in a discussion if you don't have anything to say you just be quiet and listen, you don't always have to say something. It's better to not reply to a post or create a post than posting someone else's words, that's plagiarism..
Honestly, I'll feel bad if I invest all my time reading a post (especially a lengthy one) from the beginning till the end and get to see a footnote telling me what I read was AI generated. If anyone is to use AI, it should be used as a research tool or a consultant, something that will be done with a search engine when AIs weren't rampant.