From ananova.com: "A New Zealander ended up in court after punching a man over a breach of urinal etiquette."
I have always suspected there was such a code. It would have helped me during an incident in which I once peed right next to Ted Kennedy in the Salt Lake City airport. I was going to make a pun about Chappaquiddick (there are just so many possibilities there) but I refrained.
No way! I have a Ted Kennedy pee story too! I was taking a leak in a bar on Nantucket a million years ago, and in walks Ted along with William Kennedy Smith, who had just been acquitted of rape charges. I didn't interact with either of them, just washed my hands and left as they were taking care of business, but they seemed pretty loaded. I remember thinking that perhaps the younger Kennedy might consider taking a break from the bar circuit, if only for the sake of appearances.