I haven't been there since the late 80's, and I've never gone to Mardi Gras because mob scenes aren't my cup of borscht. For the music and the food, though, there's absolutely no place else like it. Or there wasn't. Every time I listen to another news report, it sounds worse down there. I'm sure the city will recover— we Americans are nothing if not resilient, as New York's response to 9/11 demonstrated. But it's bound to be a long, hard, climb back.
It's saddening that there's looting going on. I was in the 1989 San Francisco earthquake, and there was no looting then, even though most of the city's power was knocked out and the quake hit when it was just getting dark (5:17 p.m.). So a looting spree might have been expected, but, thankfully, it didn't happen. I don't know what gets into people sometimes, but what I do know is that human beings are capable of any kind of behavior, sadly.
After the 1906 S.F. earthquake, the soldiers who were guarding the city were given a standing order that looters would be shot... not such a bad idea, really.