Yes, realistically you can't catch it all but honestly they probably don't need to. A policy like this really is just useful for banning users that are obviously using AI because they flood the front page with a hundred detailed rendered looking pieces every day. Furries may have shit taste in art, but I can't really begrudge any community made by and for human artists wanting to gatekeep out low-effort AI spammers, as this is an issue outside of furry communities as well. TBH if you've done enough editing work and paint overs of your own on top of it to the point where there isn't any AI-like uncanny-ness left it's hardly low-effort anymore and I don't think people are really going to care about it long-term, after all, there is already plenty of art that is just paint overs of a photograph online. If they want to try and take a purist stance they're welcome to try, but use of AI is not exactly black and white, or it will increasingly not be in the future with tools that blur the line between prompt-based generators and manual drawing/painting methods.
