No. Facebook engages in propaganda and psychological manipulation. It would be better for those people to avoid the internet altogether than for their only connection to it to be an NSA Skinner box designed to distort their worldview, profile them and every one they know, and mine their identities for profit.

edit: ok, "NSA Skinner box" may be a bit hyperbolic, but Facebook is still a PRISM participant that engages in emotional manipulation and ideological filtering, and they have a deeply vested interest in surveillance, profiling and correlating user data.

Why would anyone trust them to act as a gateway for the internet? Ever?