I think the key here is to treat everyone like people. By publicly shaming two individuals and associating them with sexism they are being turned into figureheads for sexism. Real people make mistakes, say stupid things, are affected by their environments and upbringing, have prejudices and biases that they acquired from a life-time of interacting with other people. Everyone is like this, many people do not even realize what some of their biases or prejudices are. Turning them into into figureheads strips away the complexity and says "these guys are what is wrong". Which is complete and utter bullshit. They were just two guys having a private conversation.
If someone says something in private that you disagree with then you should bring it up with them in private or get and intermediary, like the conference organizers to. They may have been very sensitive to gender issues and sympathetic to her agenda but she will never know because she never put the effort into discussing it with them.
If someone says something in private that you disagree with then you should bring it up with them in private or get and intermediary, like the conference organizers to. They may have been very sensitive to gender issues and sympathetic to her agenda but she will never know because she never put the effort into discussing it with them.