If You Think You're Anonymous Online, Think Again

Investigative reporter Julia Angwin was curious what Google knew about her, so she asked the company for her search data. "It turns out I had been doing about 26,000 Google searches a month ... and I was amazed at how revealing they were," she tells Fresh Air's Dave Davies...
Interview:
http://www.npr.org/blogs/alltechconsidered/2014/02/24/282061990/if-you-think-youre-anonymous-online-think-again