It's fun to watch airplanes. Watching them via radio is also fun. The data has been public since the FAA started issuing tail numbers and it's never really been an issue before.
What's really fucked up is that these jets currently operate under Part 91, just like grandpa's Cessna. Quite unregulated when it comes to how long the pilots can fly and the taxes are lower than Part 135 which is where I believe these private jets should operate. IMO a private plane should be owner operated, allowing the individual to determine safety limits. Part 135 regulates quite a bit more, including pilot rest periods and allowed weather conditions. We already regulate these billionaire's car drivers more stringently than a regular driver, why not the air travel too?
edit: oh, duh. If the airplane operates under Part 135 it can easily be owned by an LLC which is the same form of privacy protection I (and many others) use to shield my identity in real estate records.