Considering new privacy policies, some are considering deleting their Facebook accounts. This is not easy as the delete button is buried oh ever so deeply in the menu structure. Great instructions can be found on "wikiHow" website.
http://www.wikihow.com/Permanently-Delete-a-Facebook-Account
Someone posted 10 reasons that you won't be able to delete your Facebook account. Here is the link
http://www.businessinsider.com/10-reasons-youll-never-quit-facebook-even-if-you-think-you-want-to-2010-5#youre-not-going-to-go-back-to-waiting-an-hour-to-send-an-email-to-30-people-with-40-photos-attached-1
There is one reason that may override others: Employability and Marketability. Hey, it's just your life on the Internet. Enjoy the ride, no matter what you decide.