This is not just some random schoolyard humor, this is a whole generation of internet citizens' common childhood (adolescence, to be more precise). If you don't find anything of value in them, it's okay. Not everyone has to like punk or hiphop either.
The people upvoting this now are the people who were the teenagers when this was new. I don't think having a shared cultural history means anyone necessarily still agrees with this stuff. The fact that it's so shockingly out of place compared to what you usually see on HN just tells me we all (mostly) matured and aren't like this any more, and you might be surprised how many women grew up on this too.
As a data scientist with access to large amounts of private messages between individuals I can assure you that women are capable of participating in puerility.
What's your exact point -- that women will be seriously prevented from making a career out of their interest in programming because they see some rape jokes?
If so, why haven't the ubiquitous writings on high school toilets destroyed the careers of most men?
