Yes, I used <span>. I don't use the WYSIWYG editor because it is broken and inserts a bunch of ugly formatting. That's how I found out about the span tag. Sometimes when you type ~477820 it changes it into something ugly like <span>~477820 </span>, I don't even know.
I like using the WYSIWYG editor, it's very useful for making long posts (I don't care about the ugly formatting, nobody looks at the source code of your post).
More like, it causes problems when someone without that editor on (me) edits them :).
Usually not a problem for small posts because I just remove all the formatting. For large posts like the rules thread or official game feedback which is being edited by other moderators ... it has caused lots of problems before >_>