It's real simple.
Sexual harassment is not okay.
Tolerating that behaviour in others is not okay.
Inviting a known problem-person to conferences is not okay.
We can prevaricate about the "truth" of her story (and this particular incident) all we want, but the core message here is that these things do happen, women do get sexually harassed by people who are invited to tech conference, and that is not okay.
We can prevaricate about the "truth" of her story (and this particular incident) all we want, but the core message here is that these things do happen, women do get sexually harassed by people who are invited to tech conference, and that is not okay.