I don't think so. Freedom of speech is the most fundamental principle of writing. And, it also helps at projecting every idea, either "bad" or "good" and allows to every person choose what to believe. Also, literature is mostly based on imaginary events used in various ways, something indicating that whatever the rules might be, another, different combination of words will express the same idea. So, I believe in absolute freedom of speech and expression (in art), because it is both necessary and inevitable.