Comment It all depends on the law (Score 1) 1219
Here the offence for driving whilst influenced by alcohol has been revised to be "Prescribed Concentration of Alcohol" which in the jurisdiction is 0.05 for normal drivers, 0.0 for provisionally licenced drivers (recently licenced ones) and variously for other categories of drivers like Taxis and Trucks.
As a result the offence is not a subjective one about onces capacities to drive but rather just the amount of alcohol in your blood.
As a consequence, the application of "Random Breath Tests" or RBT is a fundamental part of driving. The police require no warrant to randomly sample the driving populace for testing their breath for the presence of alcohol. A result in excess of the PCA means a test at a more accurate machine and subsequently a blood test if a driver refuses the breath test.
As a driver, my privacy is not invaded, I am not "targeted by the state" but rather a part of the duties attached to my _licence_ to operate a motor vehicle is the requirement to drive with less than the PCA in my blood. End of story.
You USA folk need to get clear on the distinction between rights and duties, one cannot have one without the other.