Hehehe...
I have occasionally had one drink with a big dinner and then driven after an hour or so. I plan ahead so I'll be all right... and I don't usually go out and drink! Maybe twice a month, with friends over dinner.
Fortunately my friends think it's funny that I'm such a lightweight in the drinking department, and also have gotten over their youhtful bad habits so when it's their turn to drive, they are very careful about alcohol themselves. Like I said, my parents made it clear to me that there's a responsibility they expected me to live up to. I remember Mom once told me, when I was about 19 and spent time out with friends a bit, that if I was ever in a situation where I'd had a drink that I was to call her to come get me. And she wouldn't yell at me until the next day, either. Of course I never betrayed that trust either.
That's exactly what I tell my jedis even now...if they're in a situation that they know they shouldnt' be in, CALL ME and I'll get them no matter what. Told them that they might have consequences, but there would be no doubt of my pride and love for them.
Me? I swear to you, I'd have rather gone to jail than call my folks.