Yes, likely at different levels. For example, if I log into my myheritage account, I have 27000 DNA matches which I can download a .csv of, which includes the m

Yes, likely at different levels. For example, if I log into my myheritage account, I have 27000 DNA matches which I can download a .csv of, which includes the matching parts. I can also access the trees of those users that share theirs. This really does not include personal data, _except_ the information about where our DNA is identical or half-identical. Which has potentially far-reaching implications, but the personal data should not really be available here, unless people has opted in to sharing it. Since its a site about sharing data, its not weird that its easy to extract data from it. It is sort of the purpose.