I remember living in the dorms my first year of college, and I was amused to note that the average boys dorm room was more organized and the average girls dorm room was cleaner. Of course, that is just my experience.
Completely generalising here based on my own experiences.
In talking with my roommates about other hacker houses they've lived in, nobody has ever mentioned problems with men treating women improperly. I visited one of the houses in SF that was ~30% women and it seemed like everybody got along well and cleaned up after themselves.
The only material gender difference that has come up for us is that men are generally heavier so they make more noise when they walk around barefoot.
I agree that the gender split is very important, as it fundamentally changes the feel of the environment. I wouldn't want to live in a house with mostly guys, I don't think.
It makes me happy that the other replies point to these kinds of houses existing, but I kind of feel like I'm not "hacker" enough to look for a place like this yet. (Only one tiny project finished & for sale, no startups or anything to my name. Also, I'm hella lazy with my projects! Not sure how much this matters to these hackerhouses, but, well, they have "hacker" in the name, so...)
How is a guy supposed to act around women? And why would they need to act differently around women than around men?
Some people don't really understand what's the meaning of feminism.
But reading your comment again, I think you were just trolling.