When I was at secondary school, I used to get the school bus. One day, when I was 11, school was closed early due to snow, and the buses took us home early.
Unfortunately my bus got stuck in the snow about 3 miles from my home, at the bottom of a hill, and we were all turfed out to walk the rest of the way in a blizzard!
All of us had to walk across open common land, and most kids on the bus had to walk far further than I did. There were no adults supervising the children walking home, and the older kids just went off and left the younger ones to walk on alone.
Luckily for me, my dad was at home, because his work had been closed by the snow, and when I didn't get home when they expected me (I assume the school had rung to say we were coming home early) he set out to find me.
I was really struggling - it was snowing really hard, and I was carrying my books, and it was uphill - heaven knows how long it would have taken me to get home if he hadn't come to walk with me.
No-one really batted an eyelid at the time, though I think people would be far crosser nowadays - and the youngest child this happened to was 11, not 5 as in this thread.
The bus driver was very foolish to let this lad off on his own, and I hope he will be very sternly reprimanded.