To me, this not borderline. It constitutes an assault, and she could be charged with a crime. Had it been the other way around, he would probably have been led from the stadium in handcuffs. I don't think he should waste his time with a criminal complaint, and he shouldn't waste any more time with her.
She could be charged, but has a female ever been charged with assault for such an action, in the entire history of the United States. I doubt it.