Maybe I'm jaded because I don't really "get" the whole social network phenomena, but honestly, who really cares anyway? Productivity will (briefly) go up; a few people dependant on FB SSO's wont be able to log into some other pointless services and the internet will continue to function.
I normally down vote people when they say "what does xyz have to do with HN?", but 3 submissions commenting on a procrastination portal being down is really scraping the barrel.
[edit]
I see the submissions have now been consolidated. That makes much more sense. Good work HN admins :)