I recently read this book Dragnet Nation: A Quest for Privacy, Security and Freedom in a World of Relentless Surveillance by Julia Angwin. I found it both interesting and disturbing. I've always had the attitude, "I don't care who is watching me I don't have anything to hide." I don't mind that the government is using surveillance to find terrorist cells. If them listening in on a few of my phone calls to find a terrorist that is about to blow up Chicago. I'm okay with that. However, this book talks about so many other ways our information is being used, sold, and even stolen. Some of the examples she uses should make you uncomfortable and make you think twice about giving out your information so freely.
Here's a link to the interview I did with Julia Angwin