This is one way to get attention for a very serious but often ignored issue (i.e. vehicle idling) — create a commercial equating it to public urination.
Vehicle idling is responsible for countless emissions of greenhouse gases and other pollutants. It is also completely useless much of the time, people just don’t think or are too lazy to turn off the engine.
It can be a hard issue to address, though. Even if a community decides to outlaw unnecessary idling, it can be tough to enforce. I lived in Charlottesville, Virginia a couple years ago when the city banned completely unnecessary idling of public vehicles. Nonetheless, nearly every time I rode the bus, it would sit idling illegally numerous times.