Some people are creeped out by sex-related behavior described in the post. We agree that this creepy behavior is wrong and want to reduce it, so we talk about norms and actions against creeping.
Some people are creeped out by disabilities, or by minorities, race, disfigurement, and a host of other things. We think (some of) these creepy things are not wrong and want to encourage or legitimize them, so we talk about not allowing anti-creepy action.
This seems indeed like the worst argument in the world. The problem seems to be that the behavior discussed in the post has no precise name of its own, so it appropriates the term "creepy" which was originally much wider in application. Then others react against the new norms being applied to all "creepy" behavior.
"Creepy" is a natural category - it describes behaviors that are likely to cause a certain emotion. This emotion is triggered by things that are obviously bad, by things that are subtly bad and often announce worse things when the group isn't looking, and by non-bad things.
Our aim is to combat the first two while allowing the last one. Anti-creepy action ("Stop all creepy behavior, get out if you can't") acts against all three. Banning obviously bad things ("Ask before you touch") acts only against the first one.
One of the lessons highlighted in the thread "Less Wrong NYC: Case Study of a Successful Rationalist Chapter" is Gender ratio matters.
There have recently been a number of articles addressing one social skills issue that might be affecting this, from the perspective of a geeky/sciencefiction community with similar attributes to LessWrong, and I want to link to these, not just so the people potentially causing problems get to read them, but also so everyone else knows the resource is there and has a name for the problem, which may facilitate wider discussion and make it easier for others to know when to point towards the resources those who would benefit by them.
However before I do, in the light of RedRobot's comment in the "Of Gender and Rationality" thread, I'd like to echo a sentiment from one of the articles, that people exhibiting this behaviour may be of any gender and may victimise upon any gender. And so, while it may be correlated with a particular gender, it is the behaviour that should be focused upon, and turning this thread into bashing of one gender (or defensiveness against perceived bashing) would be unhelpful.
Ok, disclaimers out of the way, here are the links:
Some of those raise deeper issues about rape culture and audience as enabler, but the TLDR summary is:
EDITED TO ADD:
Despite the way some of the links are framed as being addressed to creepers, this post is aimed at least as much at the community as a whole, intended to trigger a discussion on how the community should best go about handling such a problem once identified, with the TLDR being "set of restraints to place on someone who is burning the commons", rather that a complete description that guarantees that anyone who doesn't meet it isn't creepy. (Thank you to jsteinhardt for clearly verbalising the misinterpretation - for discussion see his reply to this post)