Historically, there has been a serious problem for those who try to use the law to ban books: their action is commonly counter-productive. Nothing so effectively enlarges a book’s readership as a censor trying to stop people from reading it.
It reminds me that the American Library Association (ALA) promotes Banned Books Week: Celebrating the Freedom to Read at the end of September each year:
BBW celebrates the freedom to choose or the freedom to express one’s opinion even if that opinion might be considered unorthodox or unpopular and stresses the importance of ensuring the availability of those unorthodox or unpopular viewpoints to all who wish to read them. After all, intellectual freedom can exist only where these two essential conditions are met.