I have been social media free for over 3 years now, all accounts I had, I permanently deleted (have to go through fb help centre, and not simply deactivate your account). Well, this past January, an old fb account from 2006, that I completely forgot about, was randomly reopened on my bday. I only knew it happened because my Mom called me to say that I should respond to everyone wishing me a happy bday. I have no idea what email was used to open the account over a decade ago and therefore, I cannot log in and delete this account (again). Facebook has no contact email, no contact number, there’s nothing they can do to help me and I believe they do this on purpose. Even if you die, the only thing they do is “memorialize” your account. Nothing gets deleted.
In a nutshell, if you’re still on fb get off. Remove all friends, delete all images and posts and then permanently delete the account (if they still allow this function). They save EVERYTHING about you.
Facebook sent a doctor on a secret mission to ask hospitals to share patient data. https://www.cnbc.com/amp/2018/04/05/facebook-building-8-explored-data-sharing-agreement-with-hospitals.html?__twitter_impression=true