I think a good way to ban RMT is to check how many people blacklisted a certain player. If it's like 100 or more people with that player on their blacklist - they should get the ban. I mean, if someone goes into town and starts shouting spam over and over - everyone is going to blacklist them and it won't take too long before the numbers add up.

I joined a new server this weekend and I already have dozen people on my black list - it's ridiculous. If there is a way to count how many times a player is put on a blacklist, it would be nice to use that to suspend accounts. If there is not a system in place, I think utilizing a feature like this would be a good place to start.

The only downside would be if someone was really hated that people could convince enough people to blacklist them to get the ban, but I don't see this happening.