You aren't still growing, so the binge drinking can't mess up your development processes. You have more body mass, so a given amount of alcohol will cause less of an increase in your BAC.
European teens do drive - but it's not fashionable.
USA teens _have_ to drive. The party is spread out (multiple locations in suburbia) and the vehicle is the symbol of empowerment.
Obviously, mixing heavy or inexperienced drinking with driving is a recipe for death.
http://www.freakonomics.com/2011/12/28/the-perils-of-drunk-w...