The man who blew the whistle on the NSA has voluntarily come forward. You should read what Snowden said, he makes a lot of very important comments. I want to highlight this:
"It’s getting to the point, you don’t have to have done anything wrong. You simply have to eventually fall under suspicion from somebody, even by a wrong call, and then they could use this system to go back in time and scrutinize every decision you’ve ever made, every friend you’ve ever discussed something with, and attack you on that basis, to sort of derive suspicion from an innocent life and paint anyone in the context of a wrongdoer."
You don't need to have done anything wrong for the government to use your information against you. This is how tyrannies get power. Can we unite that we don't want a government that is able to do this?