If you're talking about some sort of actual tournament where there is a bracket / schedule and /or prizes to be won or winners to be declared, you're in the wrong game. Paintball is the one with money riding on it (sponsors), but in airsoft we're just playing to have fun, and if you happen to win, hopefully it's not at the cost of sportsmanship and making the losing team never want to play you again.
Putting prizes or money on the outcome of the game will definitely bring out the worst in people. People might not call their hits, or even worse: people will accuse other people of not calling their hits.