For the same reason I don't let law enforcement search my car, house, or "secure" my weopon, etc. I have nothing to hide but that's irrelevant. Also, sometimes law enforcement actually forgets you have those rights when they get used to everyone waiving them. You should be glad there are people out there that exercise their rights....often times if you don't use it you lose it. You would be surprised how many people actually think you have to show a trooper your ID, license, and allow them to search your vehicle if they ask, etc.