As far as I understood from the decisions of the moderators, some accounts that published posts from the chatbot were deleted, and users who were completely new had their accounts destroyed. Other accounts weren't banned; they just had their AI posts removed. I can assume that those accounts that were not banned still received a temporary ban. At least, I don't see them active yet.
I agree with hilariousandco recent post that it takes time to consider a decision on AI posts; however, such posts should be reported so as not to turn the forum into a society of robots.
Yes, please do, though obviously they will need a little more verification so might not get handled straight away. It's probably going to get out of hand fast with these issues now. Personally, I think it might be wise to look into disabling sigs on all new users/lower ranks until people have earned the right to have one through acquiring a large amount of merit.