Murphy, Kate. "How to Muddy Your Tracks on the Internet." The New York Times, May 2, 2012.
From the article: "Legal and technology researchers estimate that it would take about a month for Internet users to read the privacy policies of all the Web sites they visit in a year. So in the interest of time, here is the deal: You know that dream where you suddenly realize you’re stark naked? You’re living it whenever you open your browser. There are no secrets online. That emotional e-mail you sent to your ex, the illness you searched for in a fit of hypochondria, those hours spent watching kitten videos (you can take that as a euphemism if the kitten fits) — can all be gathered to create a defining profile of you.
Your information can then be stored, analyzed, indexed and sold as a commodity to data brokers who in turn might sell it to advertisers, employers, health insurers or credit rating agencies." Read more