Kill or be killed is definitely the name of the game. I've tried to be friendly, and very rarely does someone actually acknowledge it. I remember running through the woods above cherno when some dude with an einfield tried killing me. I VOIP him saying I was friendly but he kept shooting, so I told him over VOIP as soon as you reload i'm killing you. Sure enough, shots stopped and I sniped him in the head. Moral of the story, Everyone unless youre in a chat program with them is your enemy and treat them as such, Unless they are unarmed.. I don't killed unarmed.