I gotta say, the number of people on here completely confused about the idea of accepting a self-signed cert worries me.
Given the nature of the attacks and threats on both this site, and those posting on it, if you don't know what that means or how to do it, you probably shouldn't be taking the risk of posting on here.
Seriously guys, the press paint this place as a hive of terrorists, hate groups and criminals. If you're going to post here, be wise. If your employer would have an issue with you posting here, either don't or educate yourself. Free speech doesn't exist any longer. Accept it and learn the lessons learned by citizens in other similarly afflicted societies.
Centralised CA's and centralised DNS are a blight on the internet anyway. In this case it's a crazy individual with an agenda and a vendetta, but imagine if this were a government entity, or a foreign government entity.