A lengthy process but make sure to delete and not deactivate FB do not make this easy and deactivate is the more logical thing to click as deactivate isn't easy find but follow this guide to successfully delete you account.
https://deletefacebook.com/guide/
remember if you log back in again it cancels the account deletion the cunning b1stards !
So at last, I'm finally free of the data risks and the bullsh1t, question is, who will bury their heads in the sand and say , well, I don't really care, one day you just might and it might have far more serious consequences than we think.