True. But the issue is scope. Isolated looting is one thing, and that's probably what they were expecting. This sounds like (though it may not really be) something a lot bigger than "normal" looting.
At any rate, I think a bunch of disaster plans are going to be changed to account for the magnitude of looting in NO and other affected areas.
Well it's looting by individuals and wholesale looting by gangs. The gangs however, are going to be attacking rival gangs and anyone else that gets in the way of their crime spree since the police are spread so thin. Not to mention they figure it's a good time to rub-out the competition.