Given the current situation in topic #22205, I think it's best to ban ai-generated content for now. I've added it to the list of prohibited content in the upload rules and deleted all existing ai-generated posts.
My qualm with this is I think it will be very difficult to enforce. There are already cases where it's impossible to tell a post was AI-generated. Most people who have uploaded it so far have done so unknowingly because they were genuinely fooled by it.
There's also a blurry line between ai-generated and ai-assisted, and I think this line will only get blurrier in the future. I think eventually tools like inpainting and outpainting and background generation will be built into Photoshop, and it will become normal for artists to use them even for normal artworks. It will be just as pervasive and unremarkable as CGI is in films, or as people using FaceApp to make their Instagram photos look better.