As it stands your definition simply assigns to one person the responsibility for another person's feelings. This is infantilizing to the 'victim' and places the 'perpetrator' at the mercy of the "victim's" subjectivity.
It seems to me that it is this argument that infantilizes the targets of harassment and other unwelcome behaviour we're lumping under "creepy". It only works if these targets are "gormless, passive babies who can't be trusted to make decisions for themselves". (That link is on "trigger warnings" but applies here for the same reasons.)
Allowing people to define their own subjective states ("this is how I feel") seems to me to in fact be the opposite of infantilizing.
"Oh no we'll all be in trouble if this sort of behaviour is explicitly forbidden" is actually quite a common response in these sorts of discussions, and it is discussed and addressed in the OP's links.
... how many commenters here have actually read those links? :/
... did you even read the post you are replying to? :/
"Allowing people to define their own subjective states ("this is how I feel") seems to me to in fact be the opposite of infantilizing."
This has nothing to do with whether defining "creepiness" by how people feel is infantilising. Defining any behaviour that affects someones feelings a certain way is not even close to "allowing people to define their own subjective states."
As it stands it's so barely related I have to assume as well as not reading the post you are replying to you are also misusing define.
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)