My philosophy is... if a person gets hurt or killed committing a crime it ought to just be too dang bad.
But, if you sharpened the star, it would be premeditated on your part. They'd get you for that. If the law din get ya, the thief would prolly break an expensive window or dent a hard to fix body part.
I'd say, get the removable star. Take away the temptation.
Codifex
1981 240D ChinaBlue (found an engine - hope it's good) 1983
300DTurbo w/sunroof