I hope you can see the hypocrisy and bias in your desire to ban ideas you dislike – it's dangerous. A better outcome would be to fight bad ideas with good ideas.
And I hope you see the hipocrisy in saying that my idea about banning ideas that are bad for society is a bad idea. Because if that was your "good idea" vs my "bad idea" it didn't win that fight, just like it almost never does, and instead marketing, marketing budgets, preconceived notions, convenient beliefs, upbringing, the hard limit in the number of ideas one can learn about in one's lifetime and many other factors outweighs the fantasy that all ideas should be given equal exposure, as in a book titled "we should kill black people" should be countered with one titled "we shouldn't kill black people" and that every single person in every generation should extensively read both and come to their own conclusion and not use any conclusion society already learned as a whole.