I've always been reluctant to share a lot on facebook.. I imagine everything I post anywhere online is potentially visible to anyone, anywhere. With some of my opinions, thoughts, or creations, that's fine, but personal stuff about my family and close friends, that's different. Though my privacy settings may say, "friends only", that doesn't stop Facebook's algorithms from analyzing my behavior in order to serve me better ads. It's kind of a violation of my privacy, but that's privacy we give up by sharing anything on a network. Especially one provided by a publicly traded company, for free.
Here's an interesting article that may just move me in a direction:
http://edition.cnn.com/2013/02/25/opinion/rushkoff-why-im-quitting-face…