[FourtySeven]

Well, I wouldn't consider myself a "Libertine" by any stretch of the imagination, but I have to agree with anyone who says this is wrong. It is an anathema to the concept of "innocent until proven guilty". I personally think in another 30 years, we'll start seeing more road blocks for much lesser offenses, all justified by the criminals they do catch.

Bottom line: Does it catch more drunk drivers than simply pulling obvious "weavers" off the road? Probably does. But if that's really what this rationale comes down to, then why don't we have permanant road blocks on every road?

[azhenfud]

"...then why don't we have permanant road blocks on every road?"

And take away the element of "Surprise, surprise, surprise"?