I live in a block of flats opposite a private primary school. Twice a day, parents are sitting in massive big cars with their engines running (on double yellows mostly, but that's by the by). Mostly they're on their phones/iPads, or making a phone call.
If they were literally perching for thirty seconds while their kid walked out the door, I'd get it, but they are often sitting their 15 minutes or more. To be fair, the majority switch their engines off, but there are usually at least three or four idling.
I walk along this road often with my baby daughter and the fumes are just terrible. WiBU to knock on their windows and ask them nicely to turn the engine off?