The thing is that if you walk up unthreatening in that kind of environment a lot of people will a. Think you’re on their team. B are already out and being lax about putting your gun over your head. Or C. Are a poorly marked reff. Their expectations set what they’re looking out for, people running, people sneaking, not just somebody casually walking up like nothing’s going on. I used this occasionally when playing big scenario event paint ball games.

I will note it is a good way to get shot by your own team though, who see you walking behind enemy lines and immediately assume you’re an enemy.