the problem is that it either becomes to easy or impossibly hard.
to balance it you would have to ban the use of teleporting and beamjumping, which would make it WAY to easy to get hit. but leave teleporting and beamjumping in and it becomes to easy to get away from everyone.
it would either end up being a slaughterfest, with no actual winner or would end up just being a 2 point race.