Very easily. Use a virtual one. Many things can be accomplished with the right CAN DO attitude. For instance, I remember two guys who got into a virtual altercation on the web. Of course like many e-thugz, one of them didn't realize how easily one can be traced complete with a real address. To make a long story short, the e-thug got his house burnt down by the guy he was trying to act hard on.
But seriously.... a virtual stick can be used by doing a number of things. 1) Just ignore him and hope he goes away. 2) Implement a swear filter or temp server bans for people who feel the need to act that way. 3) trace the idiot down take a few pictures of him and leave said pictures taped to his door with a message like "we don't appreciate your choice of etiquette in our game".
But I guess it all comes down to each individuals' insecurities. When people get all dumb like that I just don't interact with the people in that server until he leaves.