The bad news is, your car can and will tattle on you.
If Tesla is only keeping tabs on reporters, then it sounds like that's entirely justified. Should they have warned him that he has no privacy while driving the car they loaned him specifically to report to the world about it? I don't know. In this specific case, I'm guessing he simply would have found other ways to tarnish Tesla's reputation. They may have actually, it sounds like John Broder is incredibly stupid.
If Tesla is keeping tabs on consumers, then that's definitely a bigger sin than Broder lying through his teeth. Any proof they do this for everyone? I'd be more likely to believe they only do it if you're driving THEIR car which they loaned you for a test drive for you to report truthfully on. Probably not safe to just assume they respect your privacy more than your cell phone company does though.
Beware of the Turing Tar-pit in which everything is possible but nothing of interest is easy.