I play alot of quake3.And alot of players that i know,have not yet registerd there names on x-fire & gametracker there are bad players finding and using there names on x-fire and gametracker is there a way to stop this so the real player can get his name registerd these bad people are using it to say bad things about other players when they get to there name on x-fire & gametracker

If they want to register account, they can do so and choose from the available usernames.

Unfortunately we cannot "reserve" a username. Nicknames are first come first serve. Please also be advised that throughout the entire gaming world, nicknames are not unique. If you did not know, there are probably quite a few users who would want the username "burn"