I always wondered what the deal was with public toilets. Surely it can't be that hard to keep your shit and piss inside the bowl and flush when you're done. And yet people manage to fail these simple steps all the goddamn time.
I know some of it is the "Fuck you, I don't live here" effect, and some of it is the
broken window effect (once you see the place is horrible, you feel less inclined to make any effort), but still.
Also, curious observation: at my university, the public bathrooms vary tremendously in state of cleanliness. Specifically, they are quite adequate in the building mostly populated by physicists and computer scientists, and horrendous in the building mostly populated by biologists. Apparently, 'biology is gross' has more than one correct interpretation.