I don't think the novelty ever wears off. I know too many people who go out on weekend nights and drink way more than they should, and often still drive home. And they're in the mid to late thirties.
I dont think its the Novelty, but more what you learn. In the USA you can start driving at what.. 16 is it not? and in most states drink at 21.
To make it worse, if you get caught with a DUI, you get your license taken away, Add that to the fact that the police there pull people over for broken tail lights, FOG LIGHTs, lane hopping, etc. It becomes harder for you to break the law. Now after 5 years of driving, you have more than likely seen quiet a few road accidents, been pulled over at least 10 times for regular check ups by the Police, So when you start drinking, you have hopefully LEARNT something. Granted not everyone does and the USA is proof of this as well, but if 40% of the people do, its a HUGE improvement on the system we have here in SA
EDIT Oh yes and all the police also have permenant Camera's in their Car's in the USA and the UK which need to be handed in after their shift, so they cant take bribes since it will all be on Camera.. .But try that here in SA... I've seen it here as a kid, my Father sponsored a Camera and recording system at the Charge Office when he was chairman of the CPF.. 2 weeks later the camera was stolen out of the police station.. I wonder who did that?