Is a kid flying his drone in the front yard at below treetop height an offense?
My take of the regulations is flying a drone even 1cm above the ground if you are in a no fly zone could get you into hot water.
Seems pretty obvious to me. If it's flying, it's breaking the law. There is no height limit because proving that would be a nightmare in court, and no one flys a drone at 1cm all day. If an officer sees a drone being flown at 1cm it's a dead cert that some time before or after the officer sees it , it will be up up and away...