A cop tailgated me for close to 3 miles and issued me a ticket for speeding? is this ethitical.

This may not be ethical but if you fought the ticket the only thing the administrative officer/judge is going to care about is if you were exceeding the speed limit. If you don't have any valid defenses to the ticket or you can't show that his equipment/training is defective than you probably will have to pay it. Just because he hurt your feelings or tailgated you isn't a legal defense. What you probably should have done was to move to a different lane or slowed down. If you slowed down that regardless if he was tailgating you he would have had to slow down also. DISCLAIMER: I am a licensed attorney admitted to practice only in the state of New York and therefore I answer questions based upon N.Y. law. Your individual state can and will vary with regard to the law. This answer also does not form an attorney-client relationship and/or privilege nor does it constitutes legal advice.