The penguins actually found a way to make that wanton crapulence work for them, though. Their incessant turd production helps to melt the surrounding snow so that the ground is suitable for nesting. It's not just the direct contact that does it -- the contrast of brown-on-white absorbs heat from the sun faster than the surrounding snow. They seem to have it down to something of a science, too, as you can see sort of a pattern forming in this bit of time-lapse filthiness:
Oxford Science Blog
Also known as "Satan's Slurpee."
But as unsanitary as all that is, the penguins nonetheless don't want to wallow in their own sardine squeezings any more than they have to. So, they came up with another handy adaptation for when they're stuck in one spot for lengthy periods: projectile feces. In one of the most critically important uses of research grant money of all time, a study called "Pressures Produced When Penguins Pooh -- Calculations On Avian Defecation" found that certain penguins have developed an extraordinary ability to launch their dook with enough gastrointestinal force to send it well clear of their developing eggs. That's certainly a handy skill for the bird that's trying to keep its own area tidy, but what about the unfortunate neighboring penguin, seal, or wildlife photographer at the other end of the hepatitis trajectory?
The "splash zone" at the penguin exhibit isn't nearly as fun as the one at the killer whale show.