In Hamburg's party district, St. Pauli, a smart community organizers send a message to drunken contains: Please do not urine on walls. They've prevented them to do so by using an superhydrophobic paint. Basically, it makes walls pee right back at you in a very creative way.
Granted, public urination is pretty gross. However, if you're drunk, wants to pee and would like to take a challenge, this project could end up being more of a draw than a deterrent.
watch the video here