I grew up in my dads autobody repair shop..... growing up I made many a trip to the junk yards to look at cars with him. Seeing teeth \ hair \ blood embedded in windshields....blood all over the interior had a definite impact on me... Now I sure did some Very stupid sh$t as a teen but speeding drunk in a car was Not one of them.... I did get a DUI when I was about 20 and the officer said the biggest tipoff was that I was driving too slow on the highway...he thought I must have been stoned - not drunk....
Yup! When I had just gotten my drivers license, I had friends that ran a wrecker service, and I was enlisted a couple times to bring the wheel lift to accidents when he had to tow more than 2 cars...the sight of carnage like that, one time with the body still in the car, made a really strong impression on me.
The biggest deterrent to me involved a kid I never knew...at 14, this kid named Sam took his brothers Camaro out one night after Sam's girlfriend broke up with him, and wrapped it around a tree, killing himself in the process. It was all over the news, and the day of the funeral, a guy on the school bus says, "Well, they planted Sam today." The girl I was sitting with on the bus just exploded on him...she got up in his face and gave him holy hell..."Imagine his parents, sitting there next to the casket, burying their son! How about his brother? How do you think he feels, for just leaving his car keys in the same place he's always left them? Or his girlfriend?" Man, that stuck in my head, and kept me from being a complete idiot behind the wheel.
Admittedly, I was a typical teenager. I did my share of street racing. I drove under the influence of alcohol and pot. But I was smart enough to realize when I was too far gone to get home safely. I got a pass from Mom the times that I didn't call to let them know I was staying out, just by telling her that I'd had too much fun the night before, and slept where I fell. She asked me the first 2 times I did it exactly what happened, and I fessed up to too much Jim Beam (the first time), and too much vodka (the second), and she told me that she trusted me to make the right choices from then on.