I've sent quite a few neutral tags to people using AI in the forum. I wouldn't mind changing my initial trust rating on someone who was willing to come forward, apologize and promise to not use it again in the future. I'm all in for second chances, but you have to prove yourself that you're actually worth a shot. So far, no one has contacted me asking to change their rating, which is one of the main reasons I haven't changed it.
You don't see any response from them, even after posting a cautionary message mentioning them. They do not think such a warning post is anything to go by. They are proceeding as they wish. If they had any problem, they would have tried to contact you and asked for a chance later. Since they haven't responded yet, they won't take any action. They will continue to spread rumors, and you will report them. They won't think anything of it. It would be better to consider such users as garbage for the forum.