Ah yes, back to back-biting.
As for Facebook and its congeners (the latter term a less tainted version of 'ilk') ...
If the term communication is to have any meaningful content, then by and large it can't be used to define or delineate the inherent fatuity and superciliousness of most Facebook postings (from all I can gather).
However, as Marshall MacLuhan pointed up: The medium is the message.
And if "friending" is any indication of a social network, then I'm happy — nay, ecstatic — to be a troglodyte and recluse.
Not to put too fine a point on it: Social networking is a load of crap which is only social and a network by the most trivial of definitions, primarily used by those who have no real (as opposed to virtual) friends and more and more by those who would do evil — even if a certain subset of interactors use it as legitimate communication.
And now back to regular Sunday programming ....
