Oh, and as for helping children and '
What is up with some people?' ...
I encountered another boy out 'on the tops' once. One of the jockey wheels on his rear derailleur had just fallen out. I stopped and helped him find the bits. Unfortunately, I had forgotten to take my multi-tool out with me that day, and the boy didn't have any tools with him so we didn't have any way of putting the thing back together.
All was not lost - I spotted a group of 3 or 4 adult mountain bikers riding towards us. My attempts to ask them for help were completely thwarted, however. They ignored me and swerved either side of me and the boy and just carried on with their ride - selfish b@st@rds!
I asked the boy where he was going. Fortunately, he was only about a mile or so from where his parents were parked, and it was at the end of the bridleway that we were on so he couldn't get lost. I asked if he was ok pushing his bike back to the car park and he said that he was.