Bandits! Would you act like this in real life? I mean, if society crumbled, would you really hamstring your fellow man for a steak or a few rounds of ammo? Would you kill them in cold blood for the sake of it? No, seriously. I'm curious, from a sociological point of view.
Tougher to be a survivor then? If you guys hadn't noticed, I've posted a similar question in the bandit camp: the general response is "I will kill you if I think I can profit from it/get away with it." But it gets more complicated for survivors with a code of ethics.