In Colorado we've had instances of faux cops attempting to make traffic stops. Motorists are now advised to call 911 and drive to a public, lighted area if they don't feel safe when an apparent police officer tries to pull them over.
CycleDog asks the question: "If a cop tried to make a traffic stop in [an isolated area], would a motorist or a cyclist be justified in refusing to stop until he reached a more public area?"
We then find a real life example of this. Andrew and Brian were out for a bicycle ride when a state trooper shouted for them to pull over. The cyclists were on a road with no shoulder so they rode to a nearby parking lot after indicating their intentions to the trooper. For their courtesy, Andrew spent the night in jail and has been charged with a felony!