I think Snowden showed that it is as easy as pressing a button which is why he went and blurted it out. The NSA were also working to make it easier to track people.

My take on it is privacy is dead or nearly and we have to have good legal protections of who can use what data and when. The privacy arms race will mostly be won by big government with lots of resources and enough willing/foolish patriots (Depending on your point of view).