[Lonesome in Massachussets]

That is *not* what moot means and misusing it is a usage mistake, not a grammatical mistake. Moot means “not of practical interest”, merely of academic interest or intellectual curiosity. A court finds a point is moot, if deciding it would not lead to a judicial action. For instance, if a defendant in a criminal case dies, the case is moot. He may have been unequivocally guilty, or innocent, but there is no longer a case at law.

[bagman]

I am in agreement with you. My Webster’s II New Riverside University Dictionary has the following for “moot” as transitive verb:
1.a. To bring up as a subject for debate or discussion.
b. To debate or discuss.
2. To plead or argue (a case) in a moot court.

As an adjective
1. Subject to debate : ARGUABLE (a moot point)
2.a. Law. Lacking legal significance, though having been previously decided or settled.
b. Of no practical importance : ACADEMIC.

The other consideration here is what a dictionary is supposed to do - is it supposed be desciptive or proscriptive? Is it supposed to us how words are used or is it supposed to tell us words should be used? An argument can be made for either approach. At one time the meaning of moot describe in this article may have been the proper use, but common usage has given it its present common meaning of “of no practical importance.” I think that whoever made the argument cited in this article needs to move on with his life.