Private servers are against the game rules and thus a banable offense. If you ban all these people we no longer have to see all the complaining from people (martyrs) who broke the rules and got dealt with in an appropriate fashion and it will also stop these people effectively advertising illegal servers.

The none rule breaking players of WoW can then carry on enjoying the forum community without endless new [spam] posts from self righteous rule breakers who think they are so special they can't even post in the designated thread for the discussion.