@tutumom2001 very true!
I agree with @tutumom2001 It’s not the school, it’s the parents. Everywhere that you have a good number of rich entitled parents, you will get this type of behavior. In very wealthy suburbs which have well funded public schools which serve only this wealthy population, you have the same type of parents as the ones in the story.
I would guess that the best behaved parents are those of kids at top public magnet schools.