Until you get the same group of users on your site having the same type of arguments, you don't really know what you would do or how you would handle it. There are some situations that are and will always be "no-win". Your answer seems to be that you would just ban anyone from your site who doesn't respect you or your other users. That seems to be resulting in your former users going to other sites where they are allowed to speak their minds, where they then badmouth you and give your site a bad reputation. I suspect that many people you ban simply come back with a different username and a different IP address within minutes after your banning, while laughing at the ineffectiveness of your punishment. Who's to say what the right way to handle things is? That's why its so good that there are multiple torrent sites out there that all do things differently. It offers the possibility for everyone to find the site or sites where they most feel at home.