A lot of this revolves around the new business model of using the Internet to lock everything down. Basically half your car, house, whatever will be in the cloud.
There should also be an easy way to disconnect your car from the network, because apparently, newer cars are always connected and reporting on your activities[1].
Most people probably would choose that option then, but either way, you should have to opt-in for the data sharing (whether or not it includes free Internet or other services...):
Example:
1. Do you want to share data with us?*
2. Do you want to share data with us and get free Internet?*
3. Do you want to share data with us and get a free service service that requires data sharing (ie: ads as you drive past businesses)?*
4. None of the above.
* Position, speed, microphone, car weight, Wi-Fi devices detected, etc..
