I take it you meant to type bitcointalk.org (the forum here) and not bitcoin.org. My theory is that Bitcoin still comprises mostly of nerds and nerds are mostly introverts. FB is for social people that likes to talk and mix with others, I wouldn't surprised if the majority of Bitcoiners do not have FB accounts. I was a little surprised I couldn't find an official FB page for bitcoin.org though, I really think they should link to official FB and Twitter accounts from the main site.
Not at all, if you are
social ... you should go outside your home and talk face to face with your friend (if you have the opportunity) not from a computer
.
However I don't think facebook is the right place to talk about bitcoin, it's better a forum like that (bitcointalk.org).
What?? outside?
face to face talks?
That's so 90's man, haven't you heard, sites like FB are the new 'outside' for the online generation
Extroverts use sites like FB and lesser extroverts use Twitter and introverts well they hang out mostly on forums because there is no instant messaging, voice chats, video chats, personal pics, real names etc