I understand she lied and everything (this is part of the reason this is funny) but that's not the point of what I'm saying. Take the fact she went about it the wrong way out of this part of the discussion.
I'm simply saying that people should have the right to define their race if they so choose. As medical technology advances, people are going to gain the ability to drastically change their racial appearance. So your white friends that might want to belong to the black community are going to be able to change their appearance so that people's first impression of them is as a black person (a VERY big deal in America, as is self evident). Should they not be able to do that?
The problem for me is that accepting the concept of "transrace" would basically be an endorsement to the idea of a biological divide that doesn't exist and a cultural divide that shouldn't exist. A black person and a white person is scientifically the same damn thing beyond very minor details. There's just no real self identification to change there.
You can change the color of your skin all you want, and I see no reason to care, but you can't change your race or ethnicity, nor is there any scientific reason for you to want to. The only reason you even have to check a box to verify your ethnicity on anything is because there's a history of people screwing over people of other races in various ways, and we want to try to make sure people aren't doing that anymore.
Sure, cultures have been formed around this divide, but there's nothing really stopping a white person from participating in these cultures. There's only two things stopping a white person from doing anything regarding participating in black culture.
First is the concept of cultural appropriation, which wouldn't change if you changed your racial identity since that identity would be part of that appropriation. Your background and the privileges you grew up with are still yours no matter what race you choose to identify as. It's really not that restricting as long as you acknowledge the differences in the backgrounds of an average black person and an average white person, and not make everything about yourself.
Second would be feeling unaccepted in that culture as a white person, but people too closed minded to accept you as a white person isn't going to accept you as a "transrace" anyway. Maybe you can change the color of your skin and lie about your background to become accepted, but is that really the sort of behavior we should be promoting?
A transgendered person is someone that stops lying about who he or she truly is. A transracial person would by definition almost have to be someone that lies about their past and background, in order to truly join the social construct they're trying to join. Otherwise It'd be a concept that is either pointless or racist, given that you almost have to think there's something special about being a certain race beyond the cultural background in order to believe that you can successfully change your own race like that.
Maybe people can choose to do whatever they want with themselves, but I think we can say this is a bad choice for a number of reasons.