Which editor are they using? If it's the RadEditor, then you can set defaults and they dont need to worry about it. If it's the new Feather MVC content editor, such functionality doesn't yet exist.
Set: Rad Editor strip formatting options
Value: MSWordRemoveAll, Css, Font, Span
Set: Rad Editor's content filters
Value: FixEnclosingP, ConvertFontToSpan, IndentHTMLContent