I don't know the answers but I think I can help with the approach.
"The peculiar evil of silencing the expression of an opinion is, that it is robbing the human race; posterity as well as the existing generation; those who dissent from the opinion, still more those who hold it. If the opinion is right, they are deprived of the opportunity of exchanging error for truth: if wrong, they lose, that is almost as great a benefit, the clearer perception and livelier impression of the truth, produced by its collision with error." - John Stuart Mills "Of Liberty"