Last big game I was at a group first showed up not in their approved uniform. Then proceeded to step outside the rules and infiltrate the visiting team's base. And when I say visiting team I'm talking about 100+ players from another province who were blended in with locals so the team uniform was a requirement too play that was relaxed for that group.
End result? Next time someone shows up like that and begs in because they have only one set of camo they get wrapped in caution tape. The extra shots they take as a result should speed the learning process.
Airsoft, where nothing is hurt but feelings.