I doubt any of the examples you saw had usemap missing, assuming the examples you saw were working examples
You should also have a closing </map> tag but most browsers should be able to work around a missing closing tag, although I would advise against leaving them out.
Thought you meant you wanted to see my site, thus my reluctance to post a link.
As for an example of a messed up example, maybe I just can’t find the one that didn’t have a “usemap” in it, or maybe I just missed it. In any case, why you’re so adamant to prove either is a mystery to me… Let’s make it easy and just say I missed it