One thing I'm confused on from this article is which car brands might be more or less egregious in this dimension. For example, I drive a VW, and my car is Car-Net capable, though I have not enabled the service. Is Car-Net (or some similar service) collecting data despite my not having enabled it? Clearly the car has the ability to transmit data since Car-Net is an option.
Secondarily, is data transmitted during tune ups?