NicholasW states: I think it's a mistake to misuse it and misuse can't be sanctioned by continued usage.

CapK retorts: The imposition or withholding of sanction isn't our call

If Humpty Dumpty was wrong to assign a definition to a word arbitrarily, would he be wrong if he were also to deny a definition to a word arbitrarily?

This particular misuse is, at least according to the AHD, over one hundred years old.