The fact that this happened at GDC is purely anecdotal... A similar thing happened at PAX as well, and that's more of a game festival than this:
http://www.destructoid.com/two-fun-people-were-asked-to-leave-pax-east-225430.phtml (might be NSFW, I guess...)
It's the same mentality. The idea that any public display of female sexuality is "immoral", "indecent" or "objectifying", no matter how small and trivial it is, and ignoring how these women voluntarily agreed to do it. The same mentality that has a problem with the portray of female sexuality in gaming, as we most recently saw with Kotaku's article on the latest God of War.
Personally, I believe this recurrent dispute has more to do with the different views that people have on sexuality than any sort of "power struggle" between genders. "Sexism" just happens to be a great excuse here.
Apparently most people have forgotten about the role that Feminism had during the Sexual Revolution of the 60s... How many women at the time revindicated their right to dress however they wanted and enjoy sexuality in their own way. Nowadays it seems that in order to be a "feminist", you have to be against any public display of female sexuality, no matter how small and trivial it is... Even though I know for a fact that there are many women out there that don't have a problem with it, including ones that also call themselves "feminists".
We live in a world where male strippers and underwear models exist. Where many women enjoy porn, not to mention other "suggestive" portrays of men. Where homosexuals are beginning to get the basic respect and rights they deserve. Where media that is targeted to women like Twilight and Fifty Shades of Grey is not only accepted, but wildly popular. So what justifies all these claims of "sexism" in media or these public events, in our current days ?
Anyway... I fully agree with wfz's comments. Sexuality is a natural and desirable part of life. I completely disagree with those that constantly "demonize" it, finding all sorts of moral issues with it. And it is indeed quite ironic how many of those who criticize this kind of things in the name of the gender are the first ones to disrespect the women who see things differently, treating them in a condescending manner. How about asking the opinion of these dancers or the models that appear at E3 for a change ?
