This document discusses big data, privacy, and social media. It begins by introducing the concept of privacy and how it has developed legally over time. It then examines the privacy policies of major social media sites like Facebook, Twitter, and Google+. Next, it explores how big data involves the collection and analysis of extremely large datasets that can reveal trends about human behavior. This raises privacy issues like identity theft and companies tracking users' search histories, purchases, and locations. The document also discusses regulations from the FTC around privacy and calls for greater transparency from companies. It ends by considering legal implications and how expectations of privacy have changed with social media.