Banning accounts such as this is not at all inconsistent with banning accounts with the stated intent to track or surveil an individual. Accounts such as this are dangerous and no one needs to know his travel plans. The need for privacy does not interfere with anyone's freedom of speech here.
To put it in such a highly accessible form is an invitation to crackpots. Crackpots and mobs generally do not get incited by FAA travel logs that requires some diligence to track.
Oh, so this publicly accessible information should not be subject to free speech, even though it's clearly publicly available? Should all speech that could incite crackpots be limited?
Flightradar24, as well as all sorts of similar services (FlightAware, ADSB-Exchange, etc.) let anyone watch the location of any aircraft with ADS-B in real time (as well as list everywhere the plain has been and playback previous flights)
So we should shut down flightradar24, too, I assume? Because that's a lot more highly accessible than a twitter account and has real time status. On all planes, not just Elon's. The horror!
One could argue, none of the FAA data should be public information... I personally think that's the case. All the FAA really needs to know is where all the objects are, not specific planes.
In the early days of aviation, when flight information was not public, hundreds of people would routinely die in airplane crashes. Those days are over because flight plans are now public information. When you're in the sky, you are under surveillance, no matter who you are. If you deviate from your flight plan, that is also known. It must be this way, for the safety of everyone else in the sky around you.