A "stalker" is pretty much by definition "dedicated". Otherwise it'd just be a casual observer.
But what it most important to keep remembering is that the whole discussion of elonjet account is a distraction. Sure, it's one guy posting the data for whatever motivation he has. But it doesn't matter at all, because the source raw data is public domain information available to the whole world for free on many other air traffic websites. Even if Elon were to shut off, somehow, every website in the world, the data is literally there for the taking out of the airwaves since it is being transmitted in the clear, by government mandate.
There isn't any conceivably rational argument to claim this data is private.
Let's see if its really that simple, reachable and affordable such that any mildly disgruntled oaf can do in an impetus.
_This aircraft (xxx) is not available for public tracking per request from the owner/operator._
Which proves my point.
A motivated stalker will dig in and research but that’s inevitable, but the other 99.999% losers will self-limit to whatever is available for the minimum effort.
This translates to harmless yelling at clouds, unless some cheeky troll does the homework for them.
Build a receiver with a Raspberry Pi
For under USD$100 / EUR€80, build a Raspberry Pi with a USB ADS-B receiver that can run dump1090 and PiAware. View data locally or via FlightAware Users that share data with FlightAware automatically qualify for a free upgrade to an Enterprise Account.
Perhaps you've forever lived in an academic/industrial bubble, but a significant part of the population and definitely the vast majoirity of those that would engage in taking a virtual confrontation to IRL, are borderline illiterate, have significant difficulty parsing simple manuals. You're describing setting up a computer with Linux, configuring an SDR and configuring some software to parse the data stream.
To most people, that's lunar...