A blanking plate may not solve all your problems. Several years ago my dad was in New York.

@ the time sterio theft was so bad people were "opting out" of having ANY sterio in the car. They'd put little stickers in the window's that said, "No sterio in car". I assume to save the thieves the trouble of smashing a window for nothing....

He was @ the airport when he passed by a car with one of these stickers. The window was smashed in, on the drivers seat was a hand written note that said "Just Checking."