Yeah,
I impressed by Ludwig's well-reasoned response and his idea to ban gliding - what's he going to do when the engine quits?
I suppose he could just spin into the ground immediately after engine failure - then he wouldn't have to glide and violate the ban.
As I said in an earlier post, transponders for gliders (low-powered requirements) are becoming more affordable and moreavailable and more and more gliders are installing them - this will help; as will audio varios to help the glider guys keep their eyes out the window - closure rate is a factor when you're meesing around in an airway!