This method is popular with ultralight thru-hikers and requires two materials that you don't normally carry (cord and carabiner). Like all bag hangs, it can be foiled by smart, food-conditioned bruins. Check regulations to make sure bag hangs are legal.
Everyone gets it. But the BACKPACKER editors aren't afraid to take their hats off and flaunt it. Check out this slideshow complete with details on how to submit your own (or an unsuspecting friend's) horrible camp hair pics.