Paranoid or not, we should develop a healthy skepticism about this in the society. A scary thing to me is that most people don't know about the true capability

Paranoid or not, we should develop a healthy skepticism about this in the society. A scary thing to me is that most people don't know about the true capability of information linking/correlating from multiple sources. It's not intuitive for us that you can get seemingly innocuous data and combine them to magically tell one's behavior. These kinds of threats should be systematically studied and made consciously known to the public.