Underworld Priestess
I think it depends on the book and the author. Disagreeing with the information is one thing but pure misinformation is another. Either way it can be a learning experience and it is nice to see how people evolve and learn.
I do not feel we could establish a method for preventing what you or I might consider "pure misinformation" without impinging on the rights of those who merely disagree.
In the end, I feel this is about a level of control that should not be inflicted on others. While there are limits to our private and public speech, to allow either personal bullying or bureaucratic abuses to silence people who are not harming others is to deny their personal development and assert our will over their own.
Censorship is the weapon of a tyrant- be it by banning others from participation or bullying them into silence.