That it is just as legitimate to refer to oneself as USA as it is to refer to the singular self as a plural being, ala they/them. I've noticed that you, being a grammar Nazi, are failing conspicuously to properly chastise those who do that very thing. Are you falling down on your duties? It would seem so. One would expect, were you to have integrity and be consistent, that you would indeed be regularly mocking the children who want others to refer to them in such a manner. One is not surprised, however, that you are not.Correct in what way? That U.S.A. is a pronoun!?