There are a variety of reasons why your Facebook account may be disabled, including not using your real name, posting objectionable material, scraping the site, joining too many groups, sending out too many messages, “poking” too many individuals, or delivering the same message to ten or more people.

There are no options four (at least not one that is simple)

Go to “Settings” by clicking the tab in the upper right corner and selecting “Your Facebook Information.” Then, under Deactivation or deletion, pick “Permanently delete your account.” Select “Continue” from the drop-down menu.