Not much of a shocker, but definitely disturbing nonetheless. I gave up FB years ago. Did everything I could find to remove myself from that platform, though have little doubt that my information is still there, and they take steps to try and collect any information they can about me (everyone) through their various tracking tools across the web. I do everything I can to limit the amount of data I am sharing with websites, though I know true anonymity is a difficult if not impossible task. Save for access to a few choice groups that exist solely on FB, I see no reason to even consider that a viable platform.
Good post, thanks for sharing!