property is property and land is land if its yours you can do what you like - just make sure you kill them bcs if you dont it will come back to you -so shoot to kill not hurt . and if someone really wants to steal your car they'd do it some people by any means neccesary , when i stayed in atlanta half of the grand thefts that went on happened while the owner was driving the car and got jacked or went to a gas station and got jacked for some reason it never happened at homes