My car and internal garage door is always locked. Not going to make it easier.
Once the lock was punched in on the roller door (which I heard a noise but thought nothing of it at the time) but with the motor engaged it is not possible to get in anyway even with the tiny locking bar gone which it already was. It was only after that I figured out what these random metal strips were
The best theft deterrent is that my car is a manual really after that. Even if they got the keys, can they force me to teach them how to drive it before cops come?