Statistics tend to show that penalties are not a deterrent to crime. The DUI laws are no exception.
While they have succeeded in making criminals out of ordinary people, (we just recently had a local cop, who was decorated by MAD due to his outstanding record for busting people, get nailed), the hard core drunk drivers, continue to roam our roads. I am sure you have all seen the occasional local story about the "person" who has just gotten their 13th DUI. Yet, they are still find ways to drink and drive. These people are not just having one or two drinks.
*They will eventually make it illegal to drink and drive at all..
I, like the CDL guys, would get double jeopardy, because I have a pilot's license. On the second offense, they pull your pilot's license, even though you weren't flying.
I don't condone drunk driving. If your impaired, and you drive, I think you should be off to the big house. However, making criminals out of everyone who has one or two beers, does seem not right either.