Well, this is disturbing (boldface mine):

When companies like Ancestry.com and 23andMe first invited people to send in their DNA for genealogy tracing and medical diagnostic tests, privacy advocates warned about the creation of giant genetic databases that might one day used against participants by law enforcement. DNA, after all, can be a key to solving crimes. It “has serious information about you and your family,” genetic privacy advocate Jeremy Gruber told me back in 2010 when such services were just getting popular…

The FBI maintains a national genetic database with samples from convicts and arrestees, but this was the most public example of cops turning to private genetic databases to find a suspect. But it’s not the only time it’s happened, and it means that people who submitted genetic samples for reasons of health, curiosity, or to advance science could now end up in a genetic line-up of criminal suspects.

Both Ancestry.com and 23andMe stipulate in their privacy policies that they will turn information over to law enforcement if served with a court order. 23andMe says it’s received a couple of requests from both state law enforcement and the FBI, but that it has “successfully resisted them.”

…“In the event we are required by law to make a disclosure, we will notify the affected customer through the contact information provided to us, unless doing so would violate the law or a court order,” said Black by email.

Ancestry.com would not say specifically how many requests it’s gotten from law enforcement. It wanted to clarify that in the Usry case, the particular database searched was a publicly available one that Ancestry has since taken offline with a message about the site being “used for purposes other than that which it was intended.” Police came to Ancestry.com with a warrant to get the name that matched the DNA.

“On occasion when required by law to do so, and in this instance we were, we have cooperated with law enforcement and the courts to provide only the specific information requested but we don’t comment on the specifics of cases,” said a spokesperson.

Here’s a possible solution:

If the idea of investigators poking through your DNA freaks you out, both Ancestry.com and 23andMe have options to delete your information with the sites. 23andMe says it will delete information within 30 days upon request.

Of course, both the business model and the scientific utility of these data vanish if they are removed.

But I have the utmost faith that our internal security services will make these sorts of requests in a responsible manner.