AI generated text content should NOT be allowed. But I want to possibly use ChatGPT to create comics to enhance my writing. I think that should be allowed as it augments the story. Then this begs the question - what about content that is only comics. It's very difficult to enforce any of this, but it starts with stating the policy - because if you don't at least do that, you have no recourse to ban posts/people. Then the tools to implement could be enhanced over time.
The problem is are the tools to detect AI generated content effective enough as measured by the two types of failures - false positive, and false negatives. Another way to address this is ensuring that whoever is posting it is a real person, starting off with something simple like you can't post dozens and dozens of posts in a single day (i.e. a human is not going to post dozens of stories in a single day). It's a cat-and-mouse game, so difficult to do.