Balloons are exempt from the ADS-B requirements to broadcast location. Most balloons are above 60,000 ft, away from all airplanes. Larger ones need to get exclu

Balloons are exempt from the ADS-B requirements to broadcast location. Most balloons are above 60,000 ft, away from all airplanes. Larger ones need to get exclusion zone when they launch. Small ones are assumed to be safe from small size. To launch balloons you buy balloon, build tiny payload, inflate it, and launch. Most balloons transmit location in other ways. They also explode when get too high, and then payload parachutes back to Earth, where it is collected.