Actually. Its not the bunny hopping that annoyed me, Or the carbonizer.
It was the fact that the only people in the game besides me and him, were noobs, lv 17 and below. And many of them were playing Far better than he was, one in particular was incredible with the hive cannon, and not a pray and spraw. Totally legit.
Anyway, this guy was getting all the kills, that other people deserved. And all he did was stand in the middle and jump up and down with his carbonizer, not taking any damage from anybody because the lag has gotten so bad.