Bathroom walls aren't exactly known as a hive of intelligent discourse. In fact, most of the stuff carelessly scrawled in public restrooms is misinformed and/or hateful. Once in awhile, though, somebody takes the time in between flushing and washing hands to scribble something intelligent and, dare we say it, profound.
Check out our favorite pieces of bathroom graffiti that might just make you think. Which is the smartest? Vote for your favorites.