My anecdotal experience is the exact opposite! I'm from some unpopular Canadian province and live in Switzerland. Lots of random controls in CH. I watch a lot of French television where they at least pretend to do the same in France, sort of the Gendarmes de Clermont-Ferrand. Anyway. I've also been a passenger in a car in Germany and the driver was controlled randomly. Now, in my wasted youth in a former capital of Canada, I wasn't once controlled when I should have been.