How bout if you kill yourself twice you get a warning, three times your put on time out probably a minute. I remember Cod: Waw on the Wii did something across those lines if you team killed. A fourth time you lose all you current XP for the match and it becomes locked until the next match.
There is no better way to defeat your enemies but to slice and dice em right Link?...oopz forgot you can't speak. Well I guess a simple head nod is sufficed.