I will take pictures and video of the looters who come to my house, and let them know they are being filmed.
I will then call 911 and wait for the authorities to arrive.
If they continue their activities, I will lock myself and my family in the basement of our home where I've installed a deadbolt on the door to the stairs.
We keep a bag of gorp and a six pack of Gatorade down there to satisfy the kids while we wait for the police.
I also keep a can of bear spray hidden in the basement, just in case. My wife does not approve, but I believe it may be necessary if push comes to shove.