Getting someone banned through all of tribes would be difficult. Dynamix no longer exists as an entity, now only its former parent company Sierra remains. They could release an update with that IP/IP range hard coded out (but that is highly unlikely). You could also get into contact with the owners of the master server (not Sierra, I forget who it is exactly now) and they could ban the IP/Ip range several ways, but then you would also have to contact the gamespy people and get them to block it as well with their little master server. All in all, it would be mountains of work that probably wouldn't happen in the end, because the Server owners would need a good reason to ban and this just doesn't seem to qualify.