This is a useful infographic (below) that shows how what people are sharing online and qualifies the reasons for such behavior. The end message is clear, as social media becomes more pervasive in our lives, our willingless to share personal information as part this social appetite has also risen.
In this chilling reference, photojournalist Hana Jakrlova took series of photos at a Prague brothel where customers could trade their privacy for free services. If you think about it, in a way, this policy is an extension of the deal we all make online. We essentially give up our privacy in exchange for the free use of our favorite sites.