In the 1963 case, A Quantity of Copies of Books et al. v. Kansas, the U.S Supreme Court ruled in favor of a group of booksellers who had been prosecuted by the state for selling obscene material. The court held that before any action could be taken against them, there must first be an adversarial hearing to determine whether or not the material was indeed obscene under existing law. This ruling established important procedural safeguards for those accused of distributing obscenity and emphasized that only through proper judicial proceedings can materials be deemed as such. It also underscored First Amendment protections around free speech and expression, even when it comes to controversial content.

In the dissenting opinion for A Quantity of Copies of Books et al. v. Kansas, Justice William O. Douglas argued that the majority's decision was a departure from established First Amendment principles and allowed for an overly broad interpretation of obscenity laws. He contended that this ruling gave too much power to judges and juries in determining what constitutes obscene material, potentially leading to censorship based on personal taste rather than objective standards. Furthermore, he expressed concern about the potential chilling effect on free speech as authors and publishers may self-censor out of fear their work could be deemed obscene under these vague criteria.