I agree with you 100%. I'm embarrassed that she's a self proclaimed representative of 'women in tech'.
If she really wanted to make a point she could have turned around and told the guy that what he said was not OK. Not only would it would have driven the point across that some people are more sensitive than others, but it would be treating the guy like a fellow human being.
As a female attendee of Pycon this year I was overwhelmed by all the friendly people I met. Now maybe my sense of humor is juvenile or coarse but what was overheard is a joke I'd probably make myself.
Keep in mind Pycon was attended by plenty of minors so making adult themed jokes in a crowded room was really not the smartest move. Regardless it clearly states in the Code of Conduct (https://us.pycon.org/2012/codeofconduct/) that the correct action is to find a staff member and report it and NOT post someones picture on twitter attached to hearsay.
If the comments were directed at OP that's a different story but that doesn't seem to be the case. When I go back to Pycon next year I don't want to be treated differently and as a sound minded adult I certainly don't need people to censor themselves around me.
If she really wanted to make a point she could have turned around and told the guy that what he said was not OK. Not only would it would have driven the point across that some people are more sensitive than others, but it would be treating the guy like a fellow human being.