As for hate comments in response to any of 'adrienne's in this thread, I see three that are very uncivil and have been flagged dead (and won't appear unless you have showdead on). Another is arguably uncivil and has also received a net negative votes. If you have a separate tally, please point it out.
That's not to say all of the downvotes are purely for tone. There are people who will downvote out of spite or disagreement. One issue I do think a majority of HN members agree on is the value of civil, substantive discussion, regardless of topic. As a result, HN members do overwhelmingly downvote incivility, including incivility directed at 'adrienne's comments. Please note that multiple commenters have mentioned exactly this. If you contend that they're being insincere in doing so, you of course are free to do so, but it's unlikely that you're going to be able to constructively engage with them from a position of bad faith.
I want people to be able to discuss these types of things. Regardless of what people think should be, it remains a fact that not everyone agrees on a whole host of issues. Changing one's mind is hard; changing someone else's even harder. If I can't approach the discussion with the perspective that there's hope of some sort of understanding (if not yet agreement), I'll refrain from saying anything. It's not useful—and very likely counterproductive—to do otherwise.
I'm reminded of an MLK Jr. quote about the tendency of moderates to oppose the loudness of minorities whose views aren't yet well-accepted.
I must confess that over the past few years I have been gravely disappointed with the white moderate. I have almost reached the regrettable conclusion that the Negro's great stumbling block in his stride toward freedom is not the White Citizen's Counciler or the Ku Klux Klanner, but the white moderate, who is more devoted to "order" than to justice; who prefers a negative peace which is the absence of tension to a positive peace which is the presence of justice; who constantly says: "I agree with you in the goal you seek, but I cannot agree with your methods of direct action"; who paternalistically believes he can set the timetable for another man's freedom; who lives by a mythical concept of time and who constantly advises the Negro to wait for a "more convenient season." Shallow understanding from people of good will is more frustrating than absolute misunderstanding from people of ill will. Lukewarm acceptance is much more bewildering than outright rejection.
We should strive to be an orderly community, but we should also strive to be an accepting one.
And with respect to uncivil outcry, there may indeed be a place for it. If it's repeated to the point where it ends up being effectively ignored and dismissed, does it still serve the purpose of reminding people that there are those who are offended? I personally don't think so.
All I ask is that we be careful about using that tool, particularly against a "freedom from" position that has historically been given few venues.
I believe trans people should have freedom from misgendering, because being in an environment in which you are constantly humiliated and disrespected can have negative psychological effects. As a white guy who doesn't suffer through this, I can afford to play it safe when I talk about it, because I am not directly impacted by how well my message is heard.
There are also some people who can't afford to play it safe. They need to talk about this, even if it is emotional or tough for them. If anything, they deserve to be heard more than I do. I want to make HN a place where they feel like they have a seat at the table, so I don't mind it when they meet what they perceive as incivility with a fire of their own.
Would you and I be able to have continued this discussion (which I feel is civil and constructive, and I thank you for that) if we weren't taking care with how we express ourselves? I personally doubt it. For my part, I haven't felt that I've gotten heated or needed to restrain myself or rephrase for tone (as opposed to clarity), which I most definitely have in other discussions on divisive issues (in this case the role of civility in discussion of contentious issues). I sincerely hope you feel similarly, even if you ultimately disagree with what I've said.
Regarding downvoting: I believe it's off-topic here to discuss the proper use of downvoting. There's plenty of that to be found on HN already. In my comment above I'm describing the behavior I see: the positive as opposed to the normative. I do have opinions on the matter, but they're similarly off-topic.
I'm not sure what else I have to add on the topic of civility and discussion. I often reference the Principle of Charity[0] and Rapoport's Rules[1] as I personally find them useful in guiding my approach to discussion. Thanks again for your thoughtful discussion. I appreciate it.
[0]: http://philosophy.lander.edu/oriental/charity.html
[1]: https://www.brainpickings.org/2014/03/28/daniel-dennett-rapo...
Edit to add: Within the time it took me to compose this comment, at least two of their comments have been downvoted.