nrep - 10:43 am on Jun 2, 2013 (gmt 0)
Thanks for posting that link hitchhiker. Just to clarify, were you hit on 16/17th Nov specifically - it may be worth asking John Mu what happened around that date, as it seems like some sort of step change for UGC sites. He's given good general advice, but if he doesn't know that it happened at that specific time then it may not be the reason.
FWIW, we've not got any user profile pages indexed, no printable-thread versions, no archive pages etc... we've been very selective about just getting beefy content indexed, and we've still been hit with that Nov update.