Adsitco sells a removeable star.

Again, the problem with "booby traps" is that they cause indiscriminate harm. A kid that touches, either intentionally or accidentally, a hood star that has been razor sharpened is going to have a great claim against the idiot owner. Similarly, an electrified one that causes a fall, or worse, a cardiac event in someone so predisposed, is going to do it to a person whether they're a thief or not.