Nobody is going to ban you just for having great English. That's probably just one of the criteria they're suggesting you look out for.

I really think theymos is going to have to both put a warning when new users sign up and also mass PM everyone warning them not to use AI posting and anyone doing so will be instantly banned like we do with plagiarism because it's going to get out of control. Using chatgpt to post is just as bad if not worse as plagiarism and it's probably harder to detect. I've long been calling for theymos to put a welcome message with some of the forum rules and links for further reading etc and now I hope that spurs him on to do that or something similar.