The videos gave anti-pee vigilantes in Hamburg Germany the idea of using the paint on walls to deter and punish public urinators:

Hamburg’s efforts in turn inspired San Francisco public works director Mohammed Nuru to try out the paint in San Francisco, concentrating on nine walls that are in areas with a high concentration of bars or a large homeless population.

A public works spokeswoman told Reuters that the “bounce-back” effect of the paint causes the urine to soak the urinator’s pants and shoes. “The idea is they will think twice next time about urinating in public,” she said.

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