To be safe, what I'm asking is how do you, yourself, tell other player's you're not going to attack them? As surprising as it may seem there are people who don't want to kill others. Nor am I bashing those who do enjoy killing others. That's your play style, nothing wrong with it.
For me. I look for dots by themselves, groups usually means either killing or they're with buddies, and I either go passive and approach and start doing gestures at them and then leave passive when I believe I won't be attacked or I put my gun away and do some gesture like surrender and approach.