Have to admit I don't really care if there are fewer women in tech, or if they feel uncomfortable in a boy's club, and don't see any reason why we should have to change to make them feel better.
Just because "sexism" is against your moral code doesn't mean it's against mine.
The old joke is true - to avoid sexual harassment accusations: 1) be attractive, 2) don't be unattractive. I've dated plenty of women at work, flirt all the time, and no one has ever accused me of "harassment" or "sexism."
My boss lady caught me checking out her ass once, the next few weeks she wore short skirts and made sure to walk by my desk. It was great.