While RC gliders are not drones I am concerned that they be clumped into these drone restrictions. DLG RC gliders are 1.5m sailplanes without motors. They are thrown like a discus with a peg in the wing to hold onto for the spin and release. They do have servos to control the surfaces but they do not have a motor to propel them. Once they are thrown you must search for thermals to keep them up and go higher. Top DLG RC pilots can throw them 240 to 280 feet right from the ground which is already over their highly restrictive limit. It is ridiculous that some commercial company comes by and tries to dictate that we now must fly below 200 feet so that they can use the space above that for their commercial drone use.