To me it depends on what the aircraft is doing, who is operating it and so what the intention of the owner/operator is.
UAV's and R/C planes both come in all shapes and sizes, so that doesn't have anything to do with it. The whole "all poodles are dogs, but not all dogs are poodles," thing.
I'm a senior in aerospace engineering and our capstone project is to spend the year designing and then building a UAV for the US Coast Guard to be used in a variety of situations: search and rescue ops, patrolling harbors, monitoring coastal erosion, monitoring buoys, etc... Now, remove the intentions that the USCG has for the UAV and you just have a large R/C plane with a camera that points down and an off-the-shelf autopilot. Plenty of hobbyists use the same autopilot and camera hardware that we are using.