There was one huge fact that everyone missed
This woman's photo featured not only the person she believed was acting inappropriately, but some people who even by her account were uninvolved. In fact, the person in the center of the photo, smiling, had nothing to do with what the person seated next to him allegedly said.
The Pycon organizers should have immediately escorted this woman outside and banned her from coming in. She should be banned for life for trying to ruin an innocent person's reputation. (By her OWN ACCOUNT, all the people in the photo weren't saying these things.) This is independent over whether she was in fact wronged. She had NO RIGHT to involve innocent people.
Pycon is also at fault for making their conference an umbrella organization for all causes. It should be narrowly focused around the use of Python in computing. Period. If I want to go to a political rally, I'd go to one.
We will NEVER waste our time at a Pycon again. Ever. All of us at our company feel the same way.