I have a feeling lots of people are afraid to respond with lethal force after the Zimmerman scam.
My defense...
I'm 68 years old and any attack on me could be fatal. Consequently, If you attack me I will kill you for attempted murder.
Leave old men alone...every one of them that I know are carrying guns in their pockets and many have additional guns (all legal) in their vehicles.
I carry a Ruger 380 LCP in my pocket and a Ruger P89, 30-shot, 9mm in my truck.