Honestly, majority of society really could care less about they're family tree and who they maybe related to. You may think that is sad, but I personally am one who could care less because my heritage does not make me who I am! Example, my last name is French, but it has been Americanized and is now pronounced nothing as it was originally meant to sound by my whole immediate family. I have a 95% chance of never visiting France and a 99.9% chance of never learning French. I've had people with the same last name as mine try to become friends with me on Facebook, but whats to say they even have any remote relation to me anyhow. Which brings me to the point that just because you find people to add to you're family tree, doesn't mean they actually belong on it. Knowing the color of you're skin is all you really need to know to know you!
Food for thought: I'm Agnostic/Atheist, but by my understandings, we're all products of Adam and Eve. Does this not mean everyone falls under everyones tree then??