"with opportunity to be wrong position of acting as arbiters of truth."
Sorry, but the there were ‘very fine people on both sides’ argument doesn't apply to proven science, or to seditious, treasonous message boards that incite violence and murder like this one:
As publishers you have a duty to ensure that iHub conforms to some minimum standards regarding the truth.
Yelling "Fire!"in a crowded theatre when there is no fire should not be considered protected speech by an organisation that can exercise its First Amendment rights to stop that from happening.