... when you signed-up, did you not notice:-
"By clicking on or navigating the site, you agree to allow us to collect information on and off Facebook through cookies."
>I have a Facebook page, but other than a slightly dubious photo of my younger self, the best of good luck if you want to find out anything about me from my Facebook page. I belong to a couple of dozen interesting Facebook groups concerned with things that interest me and they are very informative. Occasionally I post on these groups
>if you don't put anything on Facebook no one will find out anything about you or your data.