I'm with artie and mostly with tacit, re Facebook (and similar so-called social medial, which I consider to be more accurately described as "antisocial' media, given their virtuality).
I partcularly dislike the lack of privacy and security associated with these places. So, if I have to give up that privacy and security, then I'll be a recluse (and love every antisocial minute of it, if I give it any consideration at all).