Always try to occupy odd-numbered urinals. Never occupy a urinal right next to another urinal currently in use. And never, EVER start a conversation with anyone if you are using a urinal and/or if the person you want to talk to is using a urinal. That would just make everything really awkward.
*Guy 1 enters bathroom, occupies urinal*
Guy 1: Hey bro, what's up?
Guy 2: WHOA WHOA WHOA MAN! RULE 1-3-5!
Guy 1: Oh shit, sorry
*Guy 1 moves urinals, pissing commences in silence*
That douchebag that keeps commenting on your and your friends' statuses and keeps joining wall conversations when clearly not wanted around. Hardly anyone ever responds to any of his posts, ever, regardless of whether he directly asks someone a question through a comment. Usually also an annoying jackass that keeps hanging around you and your friends in real life and doesn't pick up the countless hints that no one likes him. The only reason why people ever accepted his friend requests was to not look like a jerk. Very similar to a facebook obligate friend.
Mike: Lost a bet to Steve
Mark: damn that sucks how much do you owe him
Mike: $15 :(
Matt: HAHA NOOB PWND
Mike *thinking*: god damn it, it's that freakin' facebook jackass again