Regarding booby traps.....
Research "set guns" which are set up to fire at an intruder. The law deals very harshly with those who set dangerous devices even if the injured/dead party was committing a crime when injured. You are asking for serious trouble!
Here's a typical case:
Booby Trap Nailed Crook, and His Victim - Los Angeles Times
Flash
Many residents express outrage that a man could go to jail for guarding what's his. Authorities are equally riled--at the idea that anyone would value property above life, would set a potentially lethal trap to keep a burglar away from his stuff. Miller should have worked with the sheriff, they say. He should have tried Neighborhood Watch. He should have been patient, let the system catch the crook.
I don't see a thief's life as much, personally.