Cheesecake you do not believe in freedom of speech if you do not believe your enemy deserves it also.
The problem with the policies you want is that they are so easy for evil people to pervert and abuse, it might start out working fine banning certain books, but then all of a sudden evil men are sitting on the boards that decides on what should be banned and then all of a sudden good books that criticize valid issues are being banned.
I can give you a good example, Canada established something called human rights councils 100 years ago aprox, they worked as de facto courts that did not have to follow the same judicial procedures that normal canadian courts do.
Im sure in the start these courts some good things but over the years they became corrupted and perverted to the point that in the year 2005 they where fining a christian preacher 20.000$ for writing a letter to a local newspaper explaining why he thought homosexuality was a sin (he also received a life time ban on expressing his opinions in public), these so called ''Human rights councils'' also started persecuting and fining people that criticized Islam.
This is a video of a guy named Ezra Levant who was hauled to the HRW because he published the Muhammed cartoons.
I have seen most of the youtube videos with Ezra Levant and they give a good picture about how banning certain opinions/books can lead to terrible things in the long run.
this is a funny video about him also