[Haskell wikibook] Using XHTML Elements in the Wikibook

Hello again One of you chaps once told me that XHTML elements had no place in the Wikibook: the rationale being that everyone, regardless of his knowledge of mark-up languages, should be encouraged to contribute to the wiki text. I'm wondering if a small amount of HTML tagging may not be such a bad idea considering the accessibility benefits. What does the list think? Cheers, Paul