Is there federal law regarding profanity?

Answer 1

The question hinges on what you determine to be profanity. There are no Federal Laws in the United States prohibiting defamation, criticism, rebuke, or any negative behavior towards religions or religious individuals that does not rise to the level of violence or instigating violence, since this would be a violation of freedom of speech. Similarly, there are no federal laws abrogating the use of curse words, even though there are federal agencies, like the FCC, which act to make sure that parents can be reasonably sure whether curse words or troubling elements are in a television show, written article, or internet post. There are numerous federal laws, however, concerning pornography, most notably, child pornography. Federal law prohibits the production, distribution, importation, reception, or possession of any image of child pornography.