I tried just about everything, then announced that I had died. Still didn't work as all my "friends" held a wake! Seriously, there is a "quit Facebook" function which offers two options; one archives all you personal data in case you change your mind and holds your account inactive and off line, the other wipes the slate clean. I used the second option and I'm still getting "friend" requests from people I do not know...
It used to be "Death & Taxes" to which has been added Facebook, I gave up.
Regards,
GtG
http://www.wikihow.com/Permanently-Delete-a-Facebook-Account
Maybe this will help