Factually I think the height the drone is flying at makes a big difference also. If you take a picture of someone from a few feet away clearly pointing at them, kind of like google glasses do, yeah, that is annoying. If however they take a photo of the beach, and you happen to be in the photo over a hundred feet from the camera and you object, well, you should probably avoid ever going out in public if that is too much intrusion for you. So yeah, closely hovering over a specific group of people is one thing, but taking broad pictures of the beach and the people on it is clearly legal and ethical. If the drone is so far away you can't tell for sure if it has a camera, on public property no less, you should learn to deal with it.