Maybe you should read upon all the data breaches, privacy scandals, fake news distributing...and interfering with *********...amongst lots of other issues.
*PSRI
Fake News happen everywhere. Be it Twitter, Google, Facebook, WhatsApp, iMessages, etc. Any popular social media platform is bound to have fake news from their users.
Data breaches is indeed a problem. But it is a problems many companies have because of poor security.
But my point is, just be reasonable with what you share in Facebook, and I can almost guarantee no problems will arise.
I've had a Facebook account for over 10 years, and have never had a problem so far.