We lock the house at night and when we are away from home. The cars are in a garage, no need to lock them at home. Away from home, for the life of me I can not understand why someone would not lock the door of their car. All one has to do is press the button.
Most of the crime in our area is people entering cars that are not locked. The lazy bastards do not want to make the effort to learn how to break into a vehicle. I do not want to let some rat bastard just take my hard earned possessions. Plus, my cassettes are priceless