You guys do realize that airsoft is an honor sport, your expected to call your hits and to play fair. Airsoft does not fully simulate war, it is a sport, unless your into that Mil-sim stuff. In a competitive match, if you are hit once, you must call your self out, and walk back to your deployment.
We could do something where when the gets tagged, we can display a font that says "tagged" and also de-equip his weapon and replace it with a Red flag item. The red flag will simulate that the player is out. Once a player is out, he cannot use his rifle unless he walks back to base in which, using custom events, we could make it so when the player steps into his deployment, he is able to use his weapon again