Heath brought up a good point, when we speak at conferences these days we have to be *really* careful not to offend anyone. The advent of social media provides a soap box for anyone who feels even slightly offended by what you say. We've seen this play out over the past few years in extreme cases but it has slowly evolved itself into a "you can't offend *anyone*, however the slightest".
Attendees of these conferences aren't exempt, as evidenced by the public outting of a couple of developers who were making sexually suggestive jokes. To the subsequent firing of one of those developers.
Finally, sexism in the workplace is nothing new, it has plagued our female friends ever since they hung up the apron to bring home the bacon. However, we're hearing more of it in the Tech sector as more women are involved in tech jobs. I remember being in university, out of a class of 200 Comp/Sci students I could count the number of women on one hand. That's changing, and it's a hard adjustment for some guys. Granted, what a lot of people overlook in the case of Github vs. Julie Ann Horvath is the fact it appears to be at its core a problem between two women (Julie and a co-founder's wife). That being said, GitHub sounds like high school all over again. One of the complaints Julie had was that some male coworkers were "gauking inappropriately" at some female coworkers while they hula hooped in the office. Hula hooping in the office? WHAT THE FUCK. That's your problem right there.
*Sigh* maybe some day things will get easier between the two sexes...
Until then, enjoy!