^Please don't take this as a personal attack, because you know I love ya, but the thing is, while it probably should be irrelevant, for anyone who's not white, it's not (I'm being Western-Centric right now, obviously). I hate to toss up words like privilege, but the experience of being White in America (and Canada and Western Europe, as far as I know) is markedly different from being Not White. Racial demographics are actually important in understanding things like social, educational, and financial inequity, violence, disease rates, morbidity, drug use, etc.
I admire the philosophy behind opting for "human" or "irrelevant" or whatever, but philosophy and reality aren't the same thing, and I think that entering incomplete data is just doing a disservice to those who don't have the luxury of considering their ethnicity irrelevant.
Glad someone wrote this
As a black American, I can tell you that all that "human" and "irrelevant" stuff is nonsense out in the real world. In fact the only folks that have the luxury of saying such things are white (or could pass as such). The rest of us know better.
I even consider the label "mixed" not particularly useful because in the real world it does not mean much. I mean honestly who isn't mixed?