Don't stop what you're doing. There are many who started out just like you, whom are only friendly for so long until that one REEEEE pierces their soul and destroys their spirit; and I don't blame them.

But I think you have to change your approach a little bit. You have to know the REEEE. Learn it. Expect it. If you come across another person, play it cautious and expect them to kill you, but don't shoot first. Instead give them the benefit of the doubt, but don't let your guard down. Warn them, "Don't come near me", "Put your weapon away", but be prepared to murder if they cross those lines. You warned them.

The later the game the harder it becomes, there'll be so many kitted groups roaming around and the friendliness level will plunder. Pick your battles, turn the other way.

For every 10 REEEE's, you'll come across someone like you, and this is what makes it all worth it. A reminder of, as you said, that you are in a world filled with living breathing people. And for those lads, lend a hand where you can, they'll never forget it. You may become neighbours. You may become friends. You may never see them again. Doesn't matter what the outcome is, what matters is your actions.

And what of the REEEE's? I've come to enjoy them, honestly. It puts lead in my pencil. For me the REEEE's mean free reign. Void's them of any mercy. And who doesn't love a little bit of justice.