Today's bandaid–solution story comes from the BBC:

Be warned: If you pee on a wall in San Francisco it may come straight back. The city's public works agency says it is testing a new urine-repellent paint in areas popular with people looking to relieve themselves.

Anyone choosing to use the treated walls as a toilet will see their urine "bounce back", according to a spokeswoman for the agency.

In a trial project, San Francisco authorities have painted nine walls in areas close to bars and in neighbourhoods with large homeless populations.

I suppose it’s easier than dealing with socioeconomic issues that may lead to someone doing that in the first place.

Signs posted on the walls, written in English, Chinese and Spanish, say: "Hold it! ... seek relief in an appropriate place".

"The idea is they will think twice next time about urinating in public," said Rachel Gordon, a spokeswoman for the city's Public Works Department.

It's the same flawed argument that people packing heat protect us from gun nuts. It assumes people shooting/urinating are in a right state of mind, and can understand consequences.

I'd be more interested in a corruption repellent. If a white collar criminal or government official steals money, the electrons used in the transaction (amplied for effect) bounce off their monitors and give them a shock.