Any media is a representation (or extension) of your senses, and your reality. If Facebook becomes your main connection with people, it can supplant real friendships, yes. But sometimes the people you "know for real" can surprise you too, right? Who knows how much thought or how much of the subconscious goes into a Facebook entry? The whole thing is a format we plug our brain into - like a street you walk down without the physicality and actuality of your "self". A ghost street, populated by the shades of solid, trustworthy, charming folk, and also by selfish and ill-mannered jackasses whose day is made if they can waste your time.