@Ramsu, More broadly, I disagree with the practice of formally asking for pronouns. Most people don't have any different pronouns, and that's more a waste of time than anything else. However, if people volunteer their pronouns, then I'll make a modest effort to adhere to them, if for no other reason than to shut them up about gender issues. I also agree that he/her can be sufficient pronouns, and I think that "they" as a third-person singular pronoun is the first sign of a decline in western society. But there's really no talking to some people, and all in all, I have better things to do.
"But in the same vain, would it not be more practical for the Tyrranid-Ork-kin not to insist everyone call *___{{][**+^_ a Tyrranid-Ork? I guess I agree that at some point somebody's gotta be the bigger fawn and just let this shit go, as you said, for practicality's sake, but... fuck. I want to get into a shouting match with *____{{][**+^_ about it."
I think you'll find that some people are too silly for words. And there doesn't seem to be much sense in waiting for the other person to be more mature when you can do so more quickly and absent the social faux-pas of calling someone else mentally disabled.
By all means, you are welcome to get into shouting matches with people. Maybe it's cathartic for you. But in general, I would say it's advisable to ignore it and move along.