It’s not just a Silicon Valley problem. But tech dudes, in general, don’t tend to be as socially adept as, say, musicians, artists, academics with a degree in The Humanities, etc. They have less options, so are more likely to bait (business meeting) and switch (forced date). It’s pathetic coercion. And, I’m sure there are some techies out there who have game and don’t resort to these tactics. I just think it’s reasonable to say women may run into this more in a geographical area dominated by men in tech.