The article has examples about people naming themselves "Аdministrator". That's not about machine-readable identifiers, it's about display names. This entire subthread is either people missing that and thinking they're talking about login usernames and the likes, in which case I don't disagree, or people actually believing it's OK to limit people's screen names to a-zA-Z0-9 in which case I say, that's deeply imperialistic and a super shit thing to do.

Is HN "deeply imperialistic and super shit" too? Or is it okay because there's no option to set a display name?