Post histories are the only way to hold people on a pseudonymous website accountable.
I think I made it very clear why their opinion should result in a ban.
Also, as a general rule, it's impolite to use anything other than "they" if you don't know someone's pronouns.
edit: any comments on the object-level issue at hand, shkkmo? Or are you going to be like the worst people on the internet and focused entirely on the meta level?
Also, I don't trust dang enough, given reports from Hector Martin and others of being ignored. So I post about it here. (As to why I don't just leave HN, well, it's too important a forum.)