Well I had a situation we're a random found me looking through my stuff and instantly started pulling the trigger, luckily he didn't realise there wasn't any ammo in his gun, so my friend went on game chat to scare him off and he said "You guys good"? "I won't shoot", at that point I realised that I forgot to tell my mate that he already tried to shoot me before, so my friend still on game chat just now comes back to our party chat and says he's cool, but I inform him of what happened earlier, at that moment the other guy runs off into a building, me and my mate start talking about unloading bullets at him, but then suddenly shots come flying in and pelt the area around us, we both realise it's the dude from earlier so we get cover and fire back.
The End, luckily for the guy we lost him, my mate did have to fight of a horde and recover from being knocked out by one lucky shot, we managed to pick up and go once we lost him.
Yeah, don't trust anyone else in game shits too real with player to player interactions atm.
I'd rather fight more zombies honestly.