I find I agree with everything you've said, yet I'm still wondering what happens to the poor person whose foot has been stood on.
Perhaps I'm just restating and agreeing with "no obligation to fix others", but the comments in the CaptainAwkward link address this specifically: the approach you describe still makes the person transgressing boundaries the focus of our attention and response. I find that caring about why someone routinely steps on feet is quite low on my list, and (perhaps this is my main point) something I'm only willing to invest resources in once they (1) stop stepping on people's feet and (2) agree and acknowledge they shouldn't be stepping on feet.
I'm also a bit skeptical of the idea you peripherally touch on, but we're seeing in a lot of the comments in this post, that avoiding the "creeper" equivalent on stepping on toes is a tough bar to clear and is unfair to ask of someone with deficits in social/people/communication skills. I think it's very telling that such people seldom seem to get into boundary-related trouble with anyone they recognise as more powerful than them (law enforcement; airport security; workplace bosses).
There was that study about (average, neurotypical) men's supposed deficits in reading indirect communication compared to women that found that it's basically rubbish - they can do it when they think they have to, and they don't with women because they think they don't have to. (Link is to non-academic summary, but has the links to the journal articles.)
I'm wandering well past your point here but you reminded me of this. :)
Certainly, if your main priority is stopping this behavior, that affects how your respond to it. But once you've decided to write articles telling the creeps how to act at events, and the advice is something other than "never go to events, just be alone", then I think you need to offer advice more than "don'ts".
And so if you've closed off the "they should just go away" route, then I think you have no choice but to offer solutions that avoid having to write the infinite list of articles about "... or dance Irish jigs at r...
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)