I had a customer of mine call me to come replace his on his 140 car because his custom made theft proof one worked,but still needed replaced.
He got so tired of punks stealing his hood emblem that he had a guy custom modify his with the inner portions of the star filed razor sharp so if someone grabbed it and pulled it would darn near cut their finger off.
Well, sure enough, he was staying in a hotel in Florida and came out the next morning to find his hood emblem broken ,but still partially intact with blood all over the front of his car.
He was so happy that it worked, but he still had to replace it, and yes, I wore rubber gloves.
They did find out who did it.
It was a hotel employee who had called off the next day because he had to get stitches in his pointer finger due to a deep "carpentry injury."
The hotel refunded his money,and informed him that the employee had been terminated.