[Porsche-O-Phile]

I get what you're saying, but it also sounds a lot like "the (unintended) ends justify the means". I have a bit of a problem with this, because if you follow that logic out, you end up with exactly what I suggested (cops harassing the populace at will anywhere, anytime because they "might" uncover a bad guy).

Here's a novel suggestion: If the popo wasn't tied up wasting their time playing with Warren Buffet's Geico-provided radar/laser guns to make him richer, maybe they could be in some of those places where the really "bad" guys hang out and doing something about it.

Ultimately it comes down to tactics - what's more likely to find/catch you a bad guy: pulling over random cars or targeting known criminal hangouts/activities/neighborhoods and following leads?

"Fishing expeditions" are discouraged as part of our judicial process. Or at least they're supposed to be.