DON'T GIVE UP THE MORAL HIGH GROUND!In real SHTF people get killed so easily. Somebody who is about to get shot and knows this tried to bite the guy who shot him. It failed, but still.
Few times I already mentioned young guys (and some older too) on many survival forums, who have opinion that when SHTF it is something like mix of Mad Max movie and PC game, so all you have to do is to have gun and go around and take stuff from people and kill them and thats it.
It is not like that in real life. Doing acts of violence will shock you hard, and depending what kind of person you are deep inside and what kind of training you have be prepared to suffer consequences because of what you did.
Having spoken with people who have given up that high ground, no matter how little they gave up, they still struggle with what they have done. It affects them to this day.
Having said that, self-defense is not a sin and does not give up the moral high ground.
Read the rest of Selco's post here to understand that some people are just evil to begin with.