Its an old thread but i have an idea how collisions could be made so that some "n00b" cannot come to a server just to screw around (also sorry for my not that good english

It could be a seperate game mode like "rounds", only:
1. Player have to win one track (not one round) to qualify for having collisions
2. Only three allready qualified players who finished one round at top places (1,2,3) (or two if one from them does not have a qualification) have the ability to collide with each other for the next round and after that they will lose qualification and have to "earn" it again by winning a track.
From the start line collisions would activate only when players with collision to each other have seperated by some distance and the same after respawning together from one checkpoint.
Or something similar
