As an example, if they're going to demand black boxes in all vehicles, there needs to be legislation in place that clearly spells out when and how that information can be used, and that the information can not ever be used for non law enforcement uses (marketing, civil suits etc). Unfortunately, the way this stuff works is that there will be a mandate to have these devices, but how and when it can be used will be sorted out in courts and messed up. Ultimately the freedom loses.
Another non-reader of the link in the OP. Unsurprising.
When you take the car to the dealership for work, they'll read the info if it's applicable to what they're doing. You sign a consent form for that already. When you buy auto insurance, I suspect that circumstantial provisions for such are in the contract. When law enforcement wants to look, they need a warrant. The only way marketers can get the info is from the dealer, if they ever read it, and you already consented when you took it in for work.
The information can do as much to help you as to hurt you in the event of an accident investigation, and it's actually part of how an advanced vehicle adjusts to your driving habits & style, to altitude & so forth.
They're relatively simple devices that are not in contact with Skynet in any way, shape, or form.
If you're so tweaked about surveillance, you definitely want to stay out of casinos. You probably want to avoid convenience & liquor stores, too, along with many roads & intersections, not to mention public transit. Pay cash for everything, encrypt email birthday greetings. Get the schedules for mapping satellites so they won't know when you were in the backyard.
The part of it all that conspiracy theorists really don't get is that nobody cares, nobody even pays attention to any of it until something weird happens. Yes, they could be tracking your every move, but on the other hand they don't bother with insignificant pissants who are just living their lives. Big brother isn't watching, because he's too lazy to even pay attention.