lol you're assuming that the type of mentality that would actually strap one of these to his bumper is capable of reading. I view this as seeding for a Darwin award! Notice I said "his", sadly us guys, and I include myself, seem to lack judgment until a certain age, like early 30's for the most part. Even at 49, as Cody said, the idea is appealing, but I am happy to say that this stage of my life I now have the ability to see the potential for repercussions.
My wife is a High school teacher and they had a behavioral psychologist come in for a seminar to discuss the differences between the adolescent female and male. Apparently the male brain is physiologically late in developing the area that is responsible for cognitive reasoning skills
. I would say that some guys seem to never develop this area of their brain.