I'm for making everything age 17 -- driving, drinking, and legal adult age. To help prevent the high fatalities on the highways, I'm in favor of mandatory jail time and drivers license revocations for anyone driving above the .1 limit.
What an idea...punish an actual harmful ACT instead of an activity which MIGHT lead to it! Oh, and establish an absolute, all-inclusive age-of-majority, and EXPECT them to act like adults at that age!
I think you've got something, there. My only change would be to raise the BAC to .12. The lower numbers exist only to facilitate the arrest of those who have had 2 drinks, hardly enough to sauce a normal-sized person. Gets revenue for the police and the insurance companies, though.