There are no switches for the driver to disable regarding the data inside your ECU[2], or Event Data Recorder[3].
It's not that you can't get away with anything anymore, it comes down to minor infractions are now enforceable (with the lucrative fines that follow) and that your car can present evidence against you.
[1] https://smart.gi-de.com/automotive/a-brief-history-of-car-co...
[2] https://www.plaintiffmagazine.com/recent-issues/item/beware-...
Since FCC testing is expensive, I would not doubt that many manufacturers just make one card to install into multiple cars (to lower the FCC testing cost). That would be the best case, as all you need to do is find and remove that card.
This way, there is no "fault" other than not being in a cellular-coverage area.
The first thing I do when I rent a car is adjust the mirrors and the seat, and then get out of the airport as quickly as I can.
I might think about resetting stuff when I get to the hotel, but if I'm renting a car I have better things to do with my life.
I doubt that even 1% of the people in the world reset anything in a rental car. Including people on HN who state that they do. This is why pressure should be put on the rental companies to do this as part of the check-in process.