For deletion your account You should follow steps below:
1.Open any page with comment form below, type any phrase for making SUBMIT button active.
Click on "SUBMIT" button.Wait for Authorization modal window.
2.Click on "FACEBOOK" authorization button.
3.Click on Profile above the text Input & pickup "Delete profile" menu item - for deleting your profile.
4.Make confiramtion on modal window
Your Profile was deleted successfully.