In some ways this is all I have always advocated for: maths needs to be done collectively, social networks can have an effective role in creating new knowledge by putting people in contact with others, etc..
But the Facebook post is not ideal: you cannot write maths properly, you cannot comment where you want, and let's face it, I cannot cope with the speed that they're producing ideas/thesis/hypotheses and demolitions. Maybe this is because I'm not a set-theorist, maybe it's because my full time job is not as a mathematician, maybe is just because I'm getting old. Who knows?
Anyways in an attempt to parse their conversation and get my own ideas straightened I've created another blog http://settheory4themasses.blogspot.com/2013/12/all-you-didnt-want-to-know-about-set.html