"Women gone wild"?

Mike Downey's Chicago Tribune sports column uses the Dana Jacobson incident to announce that women (surprise!) can "make a complete, utter, politically incorrect jackass of herself, just like a man." He then cites other incidents over the past year to make his case. My question: Why is gender a point of discussion when it is associated with a woman? And why would we expect any differently from women than from men unless we're buying into the myth that women are somehow "purer" than men? That ideology is embedded in sexist notions about the place and abilities of women in society.