Totally agree, but I already fucked up -- too late for me (or my relatives) now. Though I hate a good portion of my extended family -- so if it takes them down, I won't feel guilty.
I think Ancestry did it with Jewish DNA. Everyone in my family got a result with exactly 4% Jewish DNA. I was pretty stoked because that meant that I could criticize Jewish people and be called a self-hating Jew rather than an anti-semite. Then they "refined" their process and all of us lost that 4%. Probably because they worried about people like me using it as an excuse to openly criticize America's BFF.
I found out that I'm pretty darn white. English/Irish/Scandinavian/German. Which surprised me because I really don't like mayonnaise or oppressing people of color -- 2 things my people are supposed to be passionate about