Perhaps my view is a little skewed, but drones can invade my privacy by recording my activities in non-public (private) areas. Drones is a generic word to describe an unmanned aerial vehicle sized from palm-sized to military predator-sized. In that gamut there are most certainly drones capable of photographing with great detail my face from a distance. A Phantom with a GoPro or OEM 4K probably cannot, as you demonstrated.
In my opinion, if you mean a Phantom, say Phantom. Don't say the all encompassing word "drone". It's difficult to make a general rule covering a group with such diverse members. The general public is fearful of losing their privacy to drones, because there ARE drones capable of stealing their privacy. In today's political climate an aerial photograph of a child, is almost a certainty to be considered an invasion of privacy.
Disturbing my "privacy", although I might suggest my "peaceful serenity" is another matter. If it is a man-made or mechanical noise, it will disturb my privacy. Be it a train whistle, car or motorcycle engine or the buzz of a Phantom, if I can hear it, its invading my privacy. When I'm sitting on my back deck I have a reasonable expectation to hear air conditioning compressors kick in, lawn mowers running or the sound of trades people building a house. When out in a state park I have a reasonable expectation of not having to listen to a drone of any size from any distance.