Everyone will have to bear with me here... I don't know much about car sound systems...
The factory stereo on my car went out so I went to Best Buy and had them install a new stereo (Sony CDX-MP40). One of the things that they sales guy was very proud of was the fact that the face plate comes off. He said that this is to help prevent theft.
My question is this: How does removing the face plate discourage someone from stealing the stereo? It seems to me that the thief could simply buy a replacement from the manufacturer for far less than the value of the stereo, still resulting in a great deal for him.