My students (high schoolers) were talking about this at lunch, and all had some version of "I'd mob up on the gun store" or "I'd mob up on WalMart"
("mob up" is apparently slang for "loot")
I asked them if they really thought they'd be the only people in a greater metropolitan area of 100,000 to think to rush to those places, and they told me yes, most people would just run away.
Ah, to be 15 and know everything again.