[genericuser]

ADS-B being a broadcast would also notify anyone else listening to ADS-B broadcasts allowing for the potential of a golden age of drone piracy. Which would be quite profitable if you could avoid being caught.

ADS-B broadcasts contain a unique ICAO code, 6 hexidecimal characters filled in by the Transponder. The collision avoidance logic is handled by the TCAS unit on aircraft.

While new collision avoidance logic is being developed for unmanned vehicles in order to allow them to legally fly in airspace once the FAA restrictions are changed from see and avoid to sense and avoid, when it is released implementing it on an air frame will not be cheap, or light so will be reserved for larger drones. Think about 100k and 20-30 lbs in equipment for an ACAS-Xu Unit, Transponder, and antenna.

And because ADS-B is an internationally used system, changes like the addition of new messages to provide any other information commercial entities wanted their drone to provide would be unlikely to happen quickly if at all, as they would have to go through committee review.