I ran across it on another site. I've never heard of anything like it.
http://www.sparebumper.com/?utm_medium=Email&utm_source=ExactTarget&utm_campaign=
http://www.sparebumper.com/?utm_medium=Email&utm_source=ExactTarget&utm_campaign=
That'd work but I think a browning M2 50 cal mounted in the bed would send a better messageWhy not just get a giant spike to go in your hitch? That's be more of a lesson.