https://news.ycombinator.com/newsguidelines.html
Creating accounts to break the site guidelines will eventually get your main account banned too, so please don't do that.
Coraline Emkhe is a woman.
> I hadn't looked at pictures, but that's clearly the case.
Pictures might give you an idea of how stereotypical someone's gender presentation is for a particular gender, but they aren't dispositive evidence as to gender. In any case, and while I reject this as a valid basis for judgement in the strongest possible terms, I can't even find any post-transition pictures of Emkhe that have anything but a conventionally feminine outward gender presentation (on Google, there are a couple associated with her name that don't, but they are pictures of Chris Wanstranth and Eric S Raymond that are from articles about Emkhe.)
No one has suggested it should.
“Man” and “woman” are terms of ascribed gender, which until recently was usually ascribed based on assessment of genitalia at birth (“biological sex” is a different though related issue) and considered immutable, but is now, in most of the developed West (despite usually being still initially assessed by genitalia at birth) held as something which should be adjusted to align with gender identity.
> but that shouldn't force me to change my behavio
Obviously, no one (on HN) is forcing you to abandon the retrograde and transphobic behavior of misgendering individuals based on imposing your personal preference for how and on what basis they should be gendered over their gender identity.
Calling it out, sure. Forcing you to change, no.