I recently entered a public restroom at the same time as another guy (he was several paces ahead of me). I had to drop a deuce, and the bathroom was small, with just one urinal and one stall. They guy enters the stall ahead of me, doesn't close the door, and unzips and pees. Now I'm not going to poop in a public bathroom if it's not an emergency, so this particular course of events was beyond the pale.