I very much doubt that I, personally, have contributed to this, being as I am on the 'receiving end' so to speak. Anyway, anecdotally, I can't say I've ever encountered this. I mean the last time I got hit on by a guy in a technical context... wait, it's never happened. The closest thing I can think of is getting randomly upvoted on HN whenever I happen to mention my gender in a post, or similar.

If anything, guys in tech -- the real techies, that is -- are so horribly bad at talking to women that it's being viewed as an alien from outer space that's offputting, not being viewed as a pair of walking boobs. On that note, I definitely agree with valuing women as people. But in my experience, at least, male attitudes towards women in tech as sexual objects are not even remotely a factor. However, the concern that you won't even meet nerdy women if there aren't any women involved in tech is still valid, IMO!