It'd be too powerful. You'd kill them with one hit. But if you could accidentally hit someone as you were driving away, hilarity would ensue. But seriously, I think vehicles should be an exception. They should only be used for transportation, and in a limited sense as a place for storage. I know I have a lot of junk in my car.

The same would be for domesticated animals. You shouldn't have your cow kicking people. Just giving you milk and meat. Unless you could throw the cow.
Man, you beat me to it, Chris. Stop stealing the posts out from under me.