Yes FB knows, but that's mostly cause I know everyone on my FB.

Even though work knows, I don't FB with work, they don't need to know all the gory details of the inner workings of my mind.

I want the freedom to say what I feel without someone reading it and worrying I'm about to jump off a bridge or something, its enough I kind of censor myself on WhatsApp due to work, they can't have my FB too.