Not only the obvious ones,
all AI verbal diarrhea should be banned. From the forum, but even better if it's banned from the internet.
I use the word "obvious" because some people might argue that it's not always possible to find out whether a post has been written by a human or an AI model
All the more reason to ban it all. If the user doesn't use a chatbot to create some text and pretend he wrote it, he doesn't have to worry about being obvious or not.
For me AI generated content in forum fits nicely under rule number 33:
Posting plagiarized content is not allowed.
Agreed. But why don't they all get banned instantly?