Kids will slam car doors at dropoff/pickup. It's pretty annoying. I used to live around the corner from a school and parents would use our street for it. They can also cause unexpected heavy traffic if they have some special event.
2 years ago I landed at London City (from Zurich), got off the plane and then we all walked all the way to the exit without being stopped by a single human to check passports or customs. I couldn't believe it.