If you want to discourage drunk driving - start imposing real penalties on people that do and get caught with the standard PC, stop and test - and leave everyone else alone.
Well, the Fourth states: The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
That's pretty direct...where's the probable cause, or oath or affirmation in a random check?
Just axin'
And last but not least, todays Cops have to put up with a lot more criminals, smart mouths, jackrabbits who run, and all the other undesirables you can imagine. Also some of which will kill them if given a chance. Try to cut the Cops a little slack when you can.
So what if they set it up that the only thing they could do, is the driver pulls up, blows the test, and only gives license and registration or can be searched if they blow over the legal limit?