Nope. That is not it. Men and women joke together freely with innuendo throughout society and most of the time it is not considered a problem. She did that exact thing on Twitter. To somehow say that a physical conference space is sacrosanct in a way that Twitter is not is ridiculous.
I think that if you look carefully, what you see is that what we term political correctness today is in actuality a new label on the old idea of chivalry. It aims toward a norm of social behavior where women are seen to require special protection in a way that men are assumed not to. They can toss away that protection and engage in banter, but men can not. This has been the norm in polite society for at least 500 years. Today, it just has different ideological window dressing.