Interesting thought. If McCarthy could have subpoena'd Google, he'd have been able to prove that they were all commies and then people wouldn't be unfairly smearing his name today.
It's a bad argument for banning things but it is a perfectly correct argument for pointing out the the real cost of something. Cars kill people. We should not pretend that cars are safe, we should make a rational decision and come to the conclusion that the cost is worth the freedom of transportation.
You'r argument would be a valid analogy if I were suggesting that we make it illegal to tell anyone your location (or any other "private" information). I am only pointing out that privacy is valuable and we should count the cost if and when we give it up.