I've got to thinking, why are unmarked patrol cars even needed now in this age of paramilitary police, Homeland Security and in-your-face TSA?
Seems like the unmarked car just functions as an insult to injury anymore.
No way I would stop for even a cop car on a deserted highway. I would drive slowly to the nearest police station or a place where there are people around. The cop would just have to follow me. If they can spend hours chasing car thieves all over creation, they can follow me to a safe location.