I feel like this podcast is especially relevant right now.
Science Friday:
Online Privacy.
Facebook has dozens of toggles for privacy settings on its service, and a privacy policy longer than the US Constitution. And while many users of the service know that they're sharing information with their friends and associates, they may be surprised to find out just exactly what they're sharing, and with what groups of people. New programs that offer to tie social media integration into outside web sites offer an ever-more social experience, but they also expose even more of your online activities to social media service providers and advertisers. Is it getting too hard to keep hold of our privacy online?
In short, nothing you do online can be considered private especially if Facebook is involved. Also, having a separate browser only for FB is a good idea.