Hey for u guys with the stereos in the trunk,do what I did the first week I had the car. There is a little bar that connects the keyhole to the lock in the trunk, take the bar out and this way they cant pry open the key hole and take ur stuff
Make sure that little switch is set so you can open the trunk from the inside, if not your going to be screwed! This may not stop them from taking ur stuff, but it will take them alot longer to do so. Neway, good luck with keeping your own shi* that u paid for!