Actually, Little Hawk, there are already several entire universes made of crud. The relatively small amount of crud in our own universe is merely seepage from those other universes into ours.

There are some who have theorized that this seepage is actually an attempt at communication on the part of the inhabitants of those crud universes. But there are others who say that if some other civilization is trying to communicate with us, and they're leaving their calling cards in our tubs and toilets, they must believe we communicate via our asses, so fuck 'em.