About the theft-deterrents:
I think a very quick and easy thing to do if you don't want to spend any money but don't want anybody to be able to steal your car is to take your fuel-pump fuse (located in driver's kick panel) out if one's afraid of theft. He won't get very far without a functioning fuel pump
Luckily I don't have to worry about that crap. I don't think I'd be able to live in a place with creepy criminals wandering around my house/around my yard/around my school/work.
My car gets a garage space but I live in a neighborhood where we leave our front door unlocked at night most of the time and 3 of our cars in our driveway unlocked with the keys in them. That's one of the perks in living in a small, rural, northeastern town.
But yeah--fuel pump fuse.