The overwhelming majority of traffic stops are conducted by duly appointed public officials in the lawful execution of their duties, so I think it is unreasonable to assume otherwise. Evasion is not an acceptable strategy under these circumstances. Keep your mouth shut, use common sense, cooperate and be observant. If there is an abuse, consider it a money-making opportunity
Are you advocating taking it laying down from an LEO imposter, and then filing suit for damages? Twisted, to say the least.