No, a Crack Shield has nothing to do with crack but you will sure as hell look like you are on some when you wear it.

There should be limits. No, really. Limits. And the "Backtacular Gluteal Cleft Shield" (that gets a WTF all it's own) should be very high on said list.

I will admit to occasionally flirting with the idea of a tramp stamp, but I have never understood the ultra low cut jeans look. What do you get when you combine the concept of the two together: this abomination. If your jeans are so low you feel the need for an ass crack ‘shield’ (which, oddly enough, sort of reminds me of a bible being kept warm by your asscheeks) than your pants are too damn low!