23andme seems to be based, like many social media sites, upon others providing my personal information.

For example, I was once told that a family member provided my very personal details to the site about the entire family.

Just so they could see a family tree on the site.

Now, 23andme.com seems to have my personal data, even though I have never visited the site or agreed to their privacy policy.

That sort of personal data collection seems to be rampant across social media.