Personally, I'm not really concerned about any of my automobile being stolen. I hope it doesn't happen, but if it does, insurance will take care of things.
I kind of feel I've got too many things to worry about, without adding an automobile. The moment I begin stress too much over what may, or may not happen, that's the day I cease to be a free man, and become a slave to a hunk or metal on wheels.
I've got a buddy, he's got a 2009 R8, which he's pretty paranoid about. If he's driving home from work, and he notices a car behind him, that's been behind him for a while, he actually drives past his house, round several roundabouts, taking the long, scenic route, in case the car behind has car jackers on board. He won't let his wife drive it, he won't let his kids touch it, he gets real mad if a car's half a car's length behind him in traffic. He once got out of the car and picked a fight with a trucker, because he felt the truck was too close to the R8. (It wasn't). I just sat in the car and cringed.
Way too much paranoia, at that rate he'll have a stroke before he's 45.