the FAA says that if you want to fly this device for fun keep it below 400 feet keep it with a line of sight don't fly it directly over people but they also say that the second you want to make a profit from flying this you want to derive some revenue from the operation of this device you need a pilot's license you need to know how to land a manned aircraft you need to comply with all kinds of notification requirements – air traffic control and other places and that's a distinction a commercial versus recreational distinction […]