Tracking an aircraft's callsign does not remotely approach the bar for "stalking and harassing."
Put another way: the courts have overwhelmingly recognized the rights of "paparazzi": if you're a public figure, there is going to be independent public interest in your life.
The interest can't be intrusive (meaning that it doesn't enable someone to break into your house and take pictures of your underwear drawer), but it does allow citizens to use any public information available to them. Since airplane information is public by necessity, there is no reasonable legal structure that enhances Musk's privacy without compromising well-trodden expression rights.
Put another way: the courts have overwhelmingly recognized the rights of "paparazzi": if you're a public figure, there is going to be independent public interest in your life.
The interest can't be intrusive (meaning that it doesn't enable someone to break into your house and take pictures of your underwear drawer), but it does allow citizens to use any public information available to them. Since airplane information is public by necessity, there is no reasonable legal structure that enhances Musk's privacy without compromising well-trodden expression rights.