Lots of cars now come with a WiFi hot spot as part of their offerings. There's no way to prevent the driver from also connecting to it and circumventing whatever ill conceived notion this is
If they really wanted to push this they could do it directly in the baseband chipset and bypass the OS entirely when deciding to lock down the device to some kind of "travel mode" with limited functionality (such as no texting or no browser)
Not that I'm advocating for that sort of thing, but it's good to keep in mind that we don't really own the cellular devices we pay for and that even in the rare case we have root we can't stop them from doing what they want to our devices as long as they control the closed hardware.
I agree with the other poster about this being more workable in a fictional society with different shared values.