Mine is pretty simple, I do it simply for supplies in desperate measures, or as a safety precaution. I KOS with most people, but I have a few rules, I will not kill someone who has no supplies, as I said, I kill only for supplies or safety, and if they have no supplies or a weapon, then they fulfill none of those requirements, I also don't kill anyone who is being chased by a zombie, that is just too much of a dick move for me, plus if I kill them, I have to worry about the zombies near their corpse. What about you guys?