A touch of Armageddon is now a reality and if you still believe that it can not happen, just look at what is going on in Louisiana.
Why might people be shooting at helicopters and rescue boats? Perhaps if you were starving and trapped, had been passes by time and again, you would do it to so you would get rescued. Risking arrest would be better than to sit there and just die. Dead bodies floating all around, nothing to eat or drink, the stench that is burning your lungs. The fear of death looming would cause anyone of us to go to extreme measures.
Think back to how people panic just at the chance of a snow storm that knocks out power for a few hours. Now add two million to that and see how desperate you would be. Looters should be the least of anyone's problems down there. Who cares if someone steals a t.v set or clothes at this point. What ever is left is going to be ruined anyway and has no relevance to anything. People stealing what food they could find in stores and medicine from drug stores. In that situation you have to do what you have to do for survival.
Sure you can keep waiting for help that isn't coming fast enough and starve to death. What would you do ? Really.