Do you believe that defense of yourself or your community would be a requirement if you were the survivor of a global disaster? If so what would you put in place?
For example you might believe in moving to an isolated location, perhaps even an island or a ship anchored well off-shore, and minimising your exposure so that conflict was unlikely or you might decide to select what you consider to be the location (rural or urban) with the best resources and prepare to defend them against any competitors. What's your approach and how far would you go?
Oh yeah, keep it legal or within the bounds of post societal break-down where law and order is no longer a practical solution.