1. The NSA is building a massive data center in Utah to read every email you'll ever send. 2. The FBI maintains detailed files on numerous public, semi-public, and private figures. 3. Homeland Security is reading your tweets and Facebook status messages. 4. Your ISP may soon be required to keep files on what sites you visit.
Pay close attention to #4 as the plan is to allow the records to be used in civil cases & divorce courts as well as HomeLand Security.