I think most platforms have learned by now that you can't just "ban" trolls, they will find a way every time even if you have paywalls. If they want to troll enough they will find a way to do so. Here we don't attempt to ban or block them, but you can mute them and never accidentally reward them in the future. The majority will do so too if they want it enough and the people that don't just waste everyone's time will get the better deal out of it. :)