Law enforcement doesn't have to have an answer or info about every single event.
If I'm driving a car down the highway, law enforcement doesn't need to know where I am going or why. I'm not breaking any laws and not infringing on anyone's rights.
As a pilot I can go fly my plane at any altitude I wish as long as I am not entering any controlled airspace. I don't have to ask or tell anyone what I'm doing.
So why do they need to know why I'm flying my drone and where I'm going?