Source : Free On-Line Dictionary of Computing

spelling flame
     
         A {Usenet} posting ostentatiously correcting a
        previous article's spelling, possibly as a way of casting
        scorn on the point the article was trying to make, instead of
        actually responding to that point (compare {dictionary
        flame}).  Of course, people who are more than usually slovenly
        spellers are prone to think *any* correction is a spelling
        flame.  It's an amusing comment on human nature that spelling
        flames themselves often contain spelling errors.
     
        [{Jargon File}]
     
        (1994-11-22)