Its more of a Stop and Think message. Just because you've done something a thousand times before, doesnt mean it can't go wrong.
Like the kid who lived 5 mins away from me. Went to the butchers in his 180 to get a T bone for his dog, on his way back came down the road to where it leveled off for the intersection. Came down a bit fast like he had probalbly done many times. this time it was too fast, got airbourne as the road contiued after the intersection and went head first into a tree.
Backing up what Johno has said. hooning isnt what kills people, its the over confident. incompitent (spl?) numbnuts behind the wheel that can't control their vehicle while doing what ever they are doing.