A very practical solution

Residents in the Saint Pauli's nightclub district of Hamburg, fed up with wildpinkler (isn't that a wonderful word?) have found a good response to men and boys urinating on walls. They have painted the walls with a paint used in shipbuilding that repels water. So the random pee-er ends up with urine-soaked feet as the stream is reflected back. The only downside is that the paint is very expensive, but then so is cleaning up after such antisocial behaviour.