It takes no time to open the glove box if they've already broken into the car. The point of having a crappy radio clearly visible through the window is to prevent them from breaking in in the first place because it looks like it's not worth their while. Exactly the same principle as not leaving all your valuables on display on the back seat, or through your living room window. You can't stop someone who is determined to search for anything that might be in there, but the entire point of opportunists is that they'll go for the quick and easy score instead of wasting their time searching every car and house on the street in the hopes of finding something hidden.
Biting the hand that feeds IT
