Radiohead has a line in one of their songs about parents abandoning their kids. It was a comment about a news story at the time where the parents had left their young son alone for a week in a flat with just this:
[B"]And true love lives...on lollipops and crisps"[/B]
So sad. We get such pure love from our children and repay like that.
Gutmutter sounds like those kids need some parental attention\discipline. I've had it done to me when I get ready to pick them up in my bus. They always get a lecture. I suppose you could've stopped the car right then and given them a "what-for" OR contact the bus company with the location/time and let them address it. They might do that for you, depending upon the company.