It's not only the government that needs that data, it's other pilots. These transponders are used to prevent in-air collisions between planes. That's not a ce

It's not only the government that needs that data, it's other pilots. These transponders are used to prevent in-air collisions between planes. That's not a centralized system; it's peer-to-peer. Your plane has antennas that are directly receiving these signals and ensuring that no other plane is too close, or on a collision course. These signals are also read by ground-based antennas for similar purposes (and also by avgeeks who want to collate the data, e.g.: https://www.flightradar24.com/add-coverage https://www.flightradar24.com/add-coverage ). The system fundamentally doesn't work if you try to make it non-public. The end result might end up being more privacy for Elon's jet, sure, but also way more mid-air collisions, as it would no longer be able to serve its function of letting a plane tell other planes where it is.