Oh dear how easy it is to offend!
Intelligent use of a radio, giving GPS or map position, takes a few seconds, and situation awareness is updated for all who listen out.
I would like to go from A to B without hitting anything. But if there are a lot of gliders on route, without radios, without transponders, difficult to see at the best of times, and manoevering at variable altitudes, the chances of a midair seem high! No wonder glider pilots wear parachutes.
MG