Aw, shucks.
I just want the members of this community who reside in the US to understand that by piloting a drone, you are
not giving up your rights as a citizen of the United States. If you aren’t in the US, I’m afraid I don’t know anything about your country’s laws and I’m not going to speculate. Yes, understanding the FAA’s regulations can be daunting and police officers can be intimidating; but situations like what OP has so eloquently

described are almost always a result of law enforcement officers doing
something to address a perceived violation of a law they
think applies. It’s either that, or they knowingly overstep the limits of their authority. In either case, they’re wrong. However...
I
do not advocate arguing with the cops at the scene, regardless of whether or not they’re wrong. I speak from experience when I say that’s not a confrontation you want to get into and it rarely ends well. You’ll either have your day in court or the charges will be dropped and your property returned. In either case, you’ll hopefully have an opportunity to meet with the chief law enforcement officer of the agency involved and maybe educate him or her on a subject of which they probably have no working knowledge.
Most of these incidents are because one or more parties involved, whether pilot or law enforcement, hasn’t properly prepared for such incidents by educating themselves on the subject.