Number One. Everything you write or post. Stays
Number two: Impacts on people, such as Work, Family,
Number three: If Facebook doesn't like you wording, they change you post, from the way you want it.
Number Four: Court Of law, you see more and more people using Facebook in courts. Now why the hell would you post things, that you could get in trouble with... Stupid...Really....
Number Five: When you use Facebook. Or create account, search engines ,use that date to tell the world about you.
Don't get me wrong.It has some good features. But people use your heads.