The ultra-wealthy have complained for years about this. There's actually a method to get temporary and anonymous call signs for PJs through the FAA, but it's no

The ultra-wealthy have complained for years about this. There's actually a method to get temporary and anonymous call signs for PJs through the FAA, but it's not supported internationally, so every time you leave US airspace you have to yank and reprogram the box. So basically Musk doesn't appear to be using the tools the government gives the ultra-wealthy to avoid scrutiny of their travel, probably because it's inconvenient, but he reserves the right to complain endlessly about it.