I honestly believe KoS should be a personal choice, because in the end, if you do it enough, you should expect to be KoSed yourself because of the bandit skin you've earned. I am conflicted about Ghillie suits because time and again I've read and experienced that most people shoot Ghillie suit wearers who have military tech on sight without any reason. They consider you a sniper or a bandit. I found a ghillie suit and wore it to avoid other players and managed to get ambushed three times because of it. I don't KoS unless I am shot at first, and that is not to say I havent fired at a bandit or two on a rooftop. I have yet to kill anyone and I've only died once from bullets due to a teammate during a firefight mistaking my head for a zombie. One instance I believe KoS should be applied, I was in the supermarket and an individual with a Lee Enfield typed Friendly, ran into the market with about a dozen zombies chasing him, and ran straight up to me. I aimed at him but didnt shoot, waiting to see what he'd do. He looted my backpack without me realizing it, took my Remington shotgun from the pack and took off out the back door, leaving me stranded in the Supermarket with a dozen zombies blocking the door. He then fired out back, aggroing MORE zombies to my position and causing me to die due to lack of ammunition. I think back now that despite him typing friendly, I should have KoSed him because of the danger he posed to me drawing the zombies into the store. Some survivors can be just as deadly without a gun if they wish it. It's hard to trust anyone in this day and age and from personal experience, I say avoid survivors like the plague unless you know them firsthand.