Thank you for posting this. In light of the recent stuff that Facebook has done, I'm deleting my account. I'm glad I'm not alone in seeking the information on how to do that exactly.
Started giving your personal information away to third parties without your consent.
Deliberately ignored your privacy settings when doing so; even if you had your account set to the strictest privacy settings, they still started giving your information away to Microsoft, Pandora, and Yelp.
Slightly longer ago, suddenly changed everyone's privacy settings from defaulting to sharing most information only within your network (college, city, etc) to sharing it publicly.
Basically, they've repeatedly reduced the privacy of your account, causing you to reveal potentially embarrassing information to a much wider audience than you had intended. In some cases, you could get the old privacy settings back, but only by laboriously going through many pages of privacy settings and resetting them, every time Facebook rolls out another such update.