I am sure that in 99.9 % of the cases where a vehicle is pulled over, there is enough of a degree of probable cause/justification to warrant stopping the vehicle. Enough of these cars are stolen that it is probably a good thing that law enforcement stops/pulls them over to verify stolen wants/warrants, anyhow. I am sure that occasionally a vehicle that is stopped turns out to be a stolen vehicle, especially on the Eastern seaboard/coast. Be thankful that when they pulled you over, it was your vehicle and not stolen, and that the same officer/officers who pulled you over might just pull over the person who steals yours if and when it ever happens. Keep in mind that these cars are getting stolen more and more as time goes on.