Iain Levison has an interesting take on Drunk Driving and its enforcement

bq. Most of us think we can have a few beers and drive safely.  You know why we think that?  Because we can!  Only two types of people can’t…teenagers and alcoholics. Teenagers are still learning how to drink and drive, and alcoholics can’t control their drinking.  Virtually all drunk driving accidents…by some accounts as few as 5,000 a year… are caused by these two groups.  And the remaining ninety percent of us have paid a steep price indeed.

“More”:http://www.iainlevison.com/dui.htm