The “real names only” policies of Facebook and Google+ seem to mean: we will let you use our software, and the price you pay is your section of the social graph. And your section has to be as seamless, contiguous, self-consistent and transparent as only a fairly young and relatively fortunate person could expect it to be.
Much more detail here:
I’m also reminded of M John Harrison’s List
(title from a Wild Pumpkins at Midnight EP)