So you think acting like Mohammed is a good idea??? Brigandage tends to make you permanently unpopular with the neighbors.
I suggest a glance back at Lord of the Flies.
In the absence of normal and necessary civil and utility services, social order and mores will break down pretty quickly, with a lot of [evil] folks who WILL go wandering to prey on the weak and unprepared.
It is useless for the sheep to declare the virtues of vegetarian peace when the wolves remain of a different opinion.