Last time it happened in NYC everyone was partying on the streets, helping each other out. Plus 9 month later you had unspoken "baby boom".
In a situation like that you will have to have something that triggered the plunder and riots. Power goes out, so what? Not a big deal, it will come back. Obviously there are always going to be bad elements that will try to take advantage of the situation. But I think they would be more concerned with electronics stores, atms and warehouses than with private residences. If something like that happened I would stay home and made my presence known. I would take out my BBQ set it up on my lawn and cook up all the meat that will get spoiled anyway.
Matt