It would be interesting - and likely amusing - to extrapolate how many people must be driving around with huge caches of drugs, based on an assumption that purportedly unrelated traffic stops (or equivalent) were in fact random samples.
I really do think a "google maps" for police activity needs to be created -- including every single arrest, prosecution , subsequent legal claim... you should be able to rate police officers like restaurants on Yelp
My local courthouse is rated on Yelp. In a shocking turn of events nobody could have ever predicted, it has 1 star.