No, IP banning is not much use. Most people are on ADSL connections with dynamic IP addresses. All you would do by banning by IP address is possibly stop an innocent player from playing, and all the sad kids who cause the problems would have to do is change their IP to get around the ban. We see these pathetic little kids impersonating the B2R team on the Redline Demo server. Fortunately there is usually an admin about most times so they don't stay too long. All you can do is pity these poor kids, they obviously have some mental health issues.