Further evidence: I'm probably more vocal and appalled by this sort of thing than most (I seem to become a significant participant in many of these LWN threads, anyway), and I certainly understand the meaning of the word 'no' and in fact would never dare approach a near-stranger or indeed anyone else in any of the ways listed... but while I'm high-functioning I've only ever been to one conference of any kind (work-sponsored), and got out fast, because the population density was simply too high for me to function. I now turn that sort of junket down as a matter of course.
This indicates that there is in fact a set of autistics (probably quite a large set) in which you are sufficiently neurotypical to realise that attacking women is *bad*, y'know, but sufficiently autistic to avoid conferences. It seems unlikely to me that there are many who can tolerate conferences but who also are so afflicted that they don't realise that sexual assault is wrong.
(Note: there *are* regrettable cases of autistics committing sexual assault, usually due to severe misreading of social signals or sheer desperation -- decades with no hope of romantic relationships can do strange things to some people, we are not all cut out to be monks. But even this is rare: in most cases I have heard of the individuals in question were either severely autistic, generally attacking their carers because they hardly ever saw anyone else, or had other mental problems -- e.g. bipolar disorder, attacking in the manic phase.)