"'ve had friends that drive like complete pillocks and even after accidents some of them never bloody well learn "
I was one when I was younger, I'm probably lucky to be alive, though I haven't gone to the same extremes as some friends of mine.
One day I saw the result of an accident, 3 dead, bodies all teared apart, no joke it was pretty touching. I think it kind of affected my driving after and I also think people taking drivers license should take a day at hospital etc. seeing the results that even sometimes slow driving can cause!
