A quick Google search will tell you that Mark’s Gulfstream G650 has tail number N68885.

The FAA mandates that the jet broadcast its location over ADS-B, mostly to avoid being hit by other jets.

There are fortunately many websites that aggregate data from honorable volunteers with ADS-B receivers. So much that it’s easy to determine Mark probably took a trip to Cabos in late September.

I suppose it’s not explicitly public that it’s mark’s jet, the FAA has it registered to A7P TRUST CO INC TRUSTEE in Cheyenne, Wyoming. Another quick Google will lead you to an article that talks about how Mark’s last house was sold by an LLC managed by A7P (real estate transactions and their parties are also public data in most US jurisdictions). It’s not as if these accounts were revealing deep secrets, that were otherwise undiscoverable.

I guess now he knows how the rest of us feel about be tracked?