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Genetic testing giant 23andMe is reportedly turning the blame back on its customers for its recent data breach
(www.businessinsider.com)
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That doesn't seem that unreasonable to me. Everyone has 2^n great-great-grandparents, and that means a lot of cousins, uncles, aunts, etc. You don't have to go back many generations to reach a very large number of relatives. I think that's one of the cool things about genealogy.
Ok, that makes much more sense! I've done a tiny bit of genealogy, so I knew about the exponential numbers, but I misunderstood the sharing. Yes, I know the feature was described as "with relatives" but I was thinking of "with person". Yes, choosing to share with all relatives in one click would produce huge numbers.