I have a publicly accessible timeline (you do know that privacy settings are per-post, right?), where I post things like inspirational quotes, and write about the value of hard work, and things that I believe a prospective employer might be interested in. I do post stuff as "friends-only" and designate some people as "acquaintances". In general, on or off the internet, I do not traffic in subjectivity. I have better things to do than pontificate about politics or the controversy du jour. Idle coffee shop philosophizing is for those without the trained mind of a scientist. The truth is knowable, stop speculating and look it up
I have been contacted by prospective employers via Facebook, actually. The highest-paid job I ever had was from an old Facebook friend who started his own business.
He made something that a lot of people like. If you make something that a billion people like, and charge them a dollar each, you become a billionaire. Accepting a fixed salary at zero risk is entirely your choice.