Board Thread:General Discussion/@comment-3225604-20140324101537/@comment-5558012-20140324161209

Not protected by the first amendment:
 * Words "which by their very utterance inflict injury or tend to incite an immediate breach of the peace"
 * "true threats"
 * Public schools and the military can determine the extent of use of profanity without violating the first amendment.

As noted above, the TOC covers profanity to an extend. Communities however have more leeway in creating policies on the issue. For example, kid-oriented wikis might block for the use of any foul language; others if it's directed at someone. Personally I see no need for the use of profanity.