I don't doubt that some police or their organizations promote this kind of thing, but I don't believe that it is standard, common or correct procedure. I've been stopped and this has never happened to me. In fact, most police don't want to go beyond the ticket phase.
I've some across a few jerks in my life, but mostly I've been treated more than well.
PS I do think that Police are likely to do this with young people, because there are very good chances that they will find more. I felt harassed when I was 19 with booze in the car and being a little close to the legal limit.
