This is intended for people leaving Facebook, keep THAT in mind.
If you're leaving, who gives a rat's patootie whether you violate their terms of service or not???
Because he said to run the script once a month for a few months to delete your info on older backups.
That means you have to carefully plan your removal, and take several months doing so (according to the author’s plan).
This assumes that eventually Facebook no longer restores old backups or looks in them for data mining old content.