https://www.vice.com/en_us/article/xgwd5d/spacex-asked-faa-to-block-tracking-of-elon-musks-private-jet

SpaceX asked the Federal Aviation Administration to block flight tracking data for Elon Musk’s private jet five years ago, public records obtained by Motherboard reveal.

In response to a Freedom of Information Act request filed by Motherboard, the FAA disclosed that it received a block request for aircraft N628TS—which is the tail number of Musk’s private jet—on August 17, 2018. The request, which came from an email address called "admin@spacex.com," was filed under the FAA’s Limiting Aircraft Data Displayed (LADD) Program. The request asked for “FAA source blocking,” which is the most stringent type of flight-data blocking the FAA does.