It's so deadly it requires misinformation to kill people? Why do you think it's taking years for the public to reach consensus, if this is such a threat?
i think a very real problem people face is its hard to discern what is reliable information (information overload, earned mistrust in "mainstream media", environment/culture, etc)
banning misinformation might work short term, but longterm i suspect it will further harm things... long term credibility needs to be won back the hard way me thinks...