GW - when civility meets hunger/thirst and the convoys of "help" are not coming, I have feeling civility will be the first thing out the window.
Remember, the question isn't whether or not you're paranoid, it's whether or not you're paranoid enough!!
Again, the areas of this Country (and others) that have seen rioting, looting, etc. following a disaster in recent times all had one common factor, and I just don't see it happening here.