Hi binns -
I was expecting a 2i for my degree based on pass results but on the day of the exams the moon was not aligned with Uranus and Mars was in its ascendancy :) and I got a 2ii.
A lot of blue chip companies only recruit graduates with a 1st or 2i. Same with entrance requirements for Msc. So there I was at the age of 21 unable to secure a good graduate position or able to get onto a Msc course that would have secured me a good graduate position.
The story does have a happy ending. I got into IT and once you acquire the technical expertise no one really cares about your degree.
Anyway, my point in this. At various points in our lives major events are decided by what happens during one week, one day or even during one hour.
Sure, some bright 10 year old will have a bad day. Sure some attractive and sophisticated :) future MNetter will have a bad day at the age of 21. But I don't expect decisions to be made based on the possibility that someone, somewhere might have a bad day.