This is just plain wrong. With glider planes, you can fly around wherever you like (in the non-restricted airspace) and aren’t required to have ADS-B or FLARM i

This is just plain wrong. With glider planes, you can fly around wherever you like (in the non-restricted airspace) and aren’t required to have ADS-B or FLARM in Europe. Most people don’t do it but you could entirely rely on visual detection to prevent collisions.