The NSA tracking is just the tip of the iceberg. People are starting to notice that is you click on some site, thereafter advertisements will appear when you are on-line of that company (we do not advertise). Police can track your cell-phone and have been using that technology to arrest people. There is also location-based-marketing, where people are being tracked everywhere without your knowledge.
If you check your email on one device say a laptop, then at work on a desktop, then using your smart phone, the powers that be now know where you live, work, and how many devices you even use. We have lost all privacy. Can’t image a smart-house that starts to play advertising because you are about to do something that a manufacture wants to pitch you for business over a speaking system in your home.