I live about 100 meters from a junior village school, the kids use the football field after school hours.
4 days ago they were assembled on the road verge, jumping out and making these strange motions with their arms as vehicles of any sort drove by. I had no idea what they were doing until reading this article.
Anyway it lasted 2 days and stopped, can't say I heard a single horn sounding (well done the drivers). I'm guessing the kids got bored and went back to their football.