1) This is the USA, we will not get rid of guns. It is our right to own guns so we can shoot home invaders or someone stealing our vehicle or protect our basic rights... like owning guns.
2) Yes teenagers shoplifting and running should be brutalized. DON'T STEAL.
3) Yes, "stuff" is worth more then a criminals life. If I see some guy bash in my vehicles window to steal my laptop I should have every right to kill him on the spot, with any means I have, be it shooting or bashing his skull in with a tire iron.
4) Criminals are a detriment to society. Once you steal gum or a car, your are a thief and should be put down. Its really, really easy: Don't steal, don't vandalize, don't rape, don't mug people, and you will be fine and live life without being beaten up or killed by police. Why is this a hard concept?