I agree, based on my experiences at multiple disasters. For the most part, a disaster brings out the best in people. Where things like looting occur, it tends to be mostly goal oriented, and targeted at commercial establishments, not people's private homes. The people who are visibly armed usually stick to their own homes and businesses, and they don't tend to bother anybody who isn't bothering them.

I've also noted that it's established blue-collar, working-class neighborhoods where I've seen the most visible neighbor-helping-neighbor activity. I've seen far less of that in wealthy neighborhoods, or places with more transient populations, like apartment complexes.