What definition of sexual assault are you using exactly? Your original contention is that the author is trivializing "real" sexual assault by using the phrase "sexual assault" in an inappropriate way, yet in Ohio no such a thing exists. So it's inappropriate according to what definition? What you're actually doing is inventing in your own mind what you think sexual assault should be and then getting angry at the author for violating your contrived definition.
Do you see why it's stupid to be pedantic about the specific phrase "sexual assault"? The author used the phrase sexual assault not to conform to a definition, but because she was touched in a sexual way and felt assaulted. In my opinion such feelings are perfectly reasonable in this situation. I would have felt assaulted had I not been given a warning.
Anyone who is quibbling about terminology in this thread is guilty of the phenomena that happens when nerds meet reality: http://news.ycombinator.com/item?id=1880553.