I seriously doubt Ford is alone, unique, or even special. On-Star has been spying on everyone for > 10 years. Remember that gangster they prosecuted after having On-Star bug his car. Technically they had a warrant and all but that decreases the creepy factor exactly none!
I expect the short term to see a big rise in casual car modding to disable these devices - everything from simple breaking to special modules to feed the thrice damned spy whatever it needs to hear to keep the engine running (like yes I drove 40,000 miles circling the Ford Corporate headquarters).
OF COURSE government is probably already collecting this data but regardless of promises, executive orders, laws, or international treaties that will continue unabated. If you think otherwise you really have learned nothing at all from history. And where one group of "legal" criminals go the "illegal" ones will soon follow. I don't see a commercial model for a product to stalk your girlfriend, but that doesn't mean it won't be done. How about real time tracking for the people who make the bank deposits? I'm not criminally minded enough to come up with a good use case, but the ONLY way to prevent abuse is to NOT collect the data AT ALL!!!!! If you collect it someone, someday, somehow will use it to harm others.