Mozilla’s latest edition of *Privacy Not Included reveals how 25 major car brands collect and share deeply personal data, including sexual activity, facial expressions, and genetic and health information.
How about national security? Russia or NK might struggle hacking the CIA but Nissan or Mercedes ain't going to have the same security. Now you have hundreds of thousands of multifaceted information collection devices spread throughout the whole country in the hands of companies that would take the seat belts out if they weren't legally required to put them in.
This is exactly why it's forbidden to discuss classified information outside of a secure facility... even if you think you're alone with another cleared person.
Obviously, humans are gonna do human things, but the government has policies in place to try and prevent this sort of leak from occurring.
This isn't just about government secrets. This data could be used to blackmail someone based on where their car was and at what time or use other data acquired from the car against them.