Domestic Enemy to the Constitution of the United States makes multiple unlawful arrests for using the word "fuck", and claims he knows the case law but clearly doesn't as he violates rights.
Justice John Harlan wrote the US Supreme Courts majority 5-4 opinion in Cohen v California. Justice Harlan's opinion confirmed that the issue with which the Court was dealing consisted of "a conviction resting solely upon 'speech', not upon any separately identifiable conduct" (citation omitted). Because the conviction was based on speech, Justice Harlan stated that the defendant may be criminally punished only if his speech (the words on his jacket) fell within a specific category of speech that is not protected by the First Amendment. The justice thenoutlined why the word "fuck" did not fall into one of those categories. As Justice Harlan said in the decision, "while the particular four-letter word being litigated here is perhaps more distasteful than most others of its genre, it is nevertheless often true that one man's vulgarity is another's lyric".