You could give warnings and bans for use of offensive and vulgar language (e.g., "stupid," "fucking," "republicans"), but that would risk infringing on non-offensive or vulgar use of the words. Although personally, I can't think of a time I had to use the word "stupid" to explain how to write code. Negative nancies have no place in any form of industry, including software development forums.

Do you know what markets are?