I agree her judgement was bad and she shouldn't have posted the image (she has every right to post about the incident, though!).
But what I'm reading here is an awful lot of bile about this woman. She's being asked to answer for someone else's decision to fire someone (there's still no documentation or testimony about this fact, FWIW). She's being attacked for "setting back women's rights". She's basically being made the target for (what I perceive to be) a bunch of anti-feminist frustration among the male geeks. And that's... just really, really ugly; sorry.
She got pissed off and made a mistake, for which it would probably be a good idea to apologize. That's it. Everything else is on you guys.
This whole thread is making me sad.
For example, it turns out white people don't have to just sit there when somebody's being racist. They can speak up just as much as a black person can.
There is such a thing as unacceptable behavior. But the measure of that is not whether some member of a protected group was offended. Nobody has the right to never be offended in a public place.
Of course these very same laws require that the claim is filed confidentially, and the kind of public shaming we've seen here is itself considered harassment.
If PyCon had been held here the only party with their noses clean would the conference organisers.