This would all be a much more meaningful comment if it were 80 years ago and we were debating allowing women into the workplace at all. Outside of the tech industry--in medicine, law, business, factory work--women make up a substantial, if not equal, portion of the workforce, and the employers have figured out how to handle men and women working together. You have an express policy forbidding harassment, an HR department that responds properly to accusations, and bam! You're in the clear. For employers who do these things, they have cases of sexual harassment. They also have cases of theft, embezzlement, incompetence, misunderstandings, and all the other normal workplace issues that get worked out by having competent management and HR, and the company isn't in any particular danger from a lawsuit. Companies have to be grossly negligent in handling complaints or allowing particular environments to persist, to be liable.
Except in the tech industry, the retarded manchild of the working world, where the male/female ratios are from the 1960s, and so are the attitudes of your average techie--and the startup world is 10 times worse than everywhere else because they're not big enough to need competent HR professionals and they imagine themselves to be "disruptors" of the status quo. It's improved a lot over the last couple decades, if only because of the general improvement in society's attitude towards women. But if you want to see truly caveman sexism, look no further than the latest Hacker News darling.
BTW, women in the workplace don't really want a change in the status quo--more flexible hours, etc., is just more sexist "men are from mars" bullshit. What women want is not to have to put up with crap because they're women. Figure that part out (and as I said, most of the Fortune 1000 could give lessons on it), and you're golden.