When man piss in wind, wind piss back, a modern Confucius states. In this line, the city of Hamburg ingeniously sought to address its growing public urination problem in the city's busy party center by painting walls with hydrophobic paint. Next time an unsuspecting person wants to take a load off in Hamburg's St. Pauli neighborhood, he might be in for a surprise - it'll splash back at him.
It's unclear to me at the moment if the city counsel actually expects some practical results or if this is all a marketing gimmick intended on raising awareness. Even so, it's an inventive way to address public urination. The video above documenting Hamburg's initiative was produced by community group IG St Pauli. Unfortunately, it's in German but it's suggestive enough.