They need a click in chat option to report RMT. The game knows your server, time, date, and if that was a tell or a shout. If a shout, it knows your zone. At the same time, that character gets blacklisted. Behind the scene, that entire account gets blacklisted for you. When an account gets perma-banned or characters deleted, those names are auto-removed from your blacklist. Other games do parts of these, it would be nice to see a game roll them all up together.