I think he did: there seems to be no discussion that he violated the conference's code of conduct. If we want to reduce the sexism in tech, I think reporting these instances is perfectly fine, and even commendable.
However.
She could have asked them politely to stop. If she didn't feel safe doing that, she could have talked in private to the conference's organizers. An e-mail would do. But she took it to Twitter instead, so everyone can point at them. I think she was in the wrong in doing that, and they both ended up suffering from it.
If there were a lesson to get from here, I'd say it would be "have you considered talking?". Or perhaps "do you really want to bring the Internet into our discussion?".