How Pizza Night Can Cost More in Data Than Dollars

Stephanie Stamm, Tripp Mickle and Jessica Kuronen:

The smartphones, Facebook accounts and other technology products deeply embedded in modern life help people get more things done every day. They also gather more information about us than we often realize.

But Facebook’s crisis over how it handles and protects user data has led some to ask: What data am I giving up?

Imagine “Sally” sets up a pizza-and-movie night with her friend “Kristen.” The Wall Street Journal reviewed privacy statements to assess just how much data could be unknowingly shared on top of the price of that pepperoni pie.