A flying device equipped with a camera is only potentially a surveillance device, much like a camera in your hand. If your flying camera takes pictures of general scenery for your own interest, no-one else would be interested. If, on the other hand, you start taking pictures of particular people and/or places with the intention gathering information, it becomes surveillance. Otherwise, the plane is just a tall tripod for the camera. It does look like another area that the paparazzi will exploit, and will no doubt, it the fullness of time, ruin a perfectly good hobby for the innocent with a mountain of rules.