Everybody has a preconcieved notion of what will happen in a post apocalyptic event, largely fueled by Hollywood writers who can barely navigate out of Encino. Any disaster is a interuption of services and social mores. Society will do evedrything it can to reestablish the staus quo. I can tell you what happened after hte relatively benign Northridge earthquake. Some merchants and individuals tried price gouging and hoarding of essentials.Several people were prosecuted. One Burger King in particular, who charged $2 for canned cokes was the recipient of such bad P.R. It was closed down.Peoiple have long memories. My grandparents would cross the street in the 1960s when one depression era merchant approached.