Not only is ubiquitous surveillance ineffective, it is extraordinarily costly. … It breaks our technical systems, as the very protocols of the Internet become untrusted…. It’s not just domestic abuse we have to worry about; it’s the rest of the world, too. The more we choose to eavesdrop on the Internet and other communications technologies, the less we are secure from eavesdropping by others. Our choice isn’t between a digital world where the NSA can eavesdrop and one where the NSA is prevented from eavesdropping; it’s between a digital world that is vulnerable to all attackers, and one that is secure for all users.
—Security expert, Bruce Schneier, writing in the Atlantic in January 2014, taken from No Place to Hide by Glenn Greenwald.