Instead of wrapping the span tag around the word banned, you just end it with a "/" symbol to say "only apply it to the word that follows" - but you would still need the word "Banned" after the span tag.
I consider this bad programming practice, for something like a span, or a div - you should really have it wrapped around the text. There's some tags that are okay like that... singular tags like <br /> or <hr /> that don't have closing tags. Or if you have a cell in a table that has no data in it, <td /> is acceptable. But some older browsers don't know what to do with that syntax, so they just apply it to everything until they reach a closing tag. Rare as it may be to see someone using IE4, it happens from time to time.
That is why i posted what i did, its still bad coding, to be xhtml compliant it has to be closed to be valid.