I have been playing this game for a long time (10 years + almost every weekend) so for me it would more of a check system.
Shot self in foot: Check
Shot teammate in Back, neck, balls, knee, head, on the break, while teammate is in the snake, while teammate is walking off, because teammate was not communicating....: check
Shot Ref: Check
Shots into barrel sock: Check
Shot photographer: Check
The list goes on. One thing that I have never done though is bunkered someone that is young and new to the game.