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Comment by uncletammy | Hacker News Reader

This is exactly how I feel about my friends/family having Facebook apps on their phone. I didn't consent to giving my contact info to Facebook. I wasn't given a choice.

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Agreed. But at least I don't leak their data in return. I figure Facebook must have 99%+ coverage of the world's social graph by now, including all the holdouts. You may not have an account, but they know you exist, what you look like, what your phone number is and probably where you are just by observing the nodes that are still 'blank'. Shadow profiles should be assumed to be just as detailed as the rest. It's one reason why there are very few photographs of me online (or elsewhere). I'd like the option to go rogue one day to be open to me ;)

It is impossible to have an "expectation of privacy" over the DNA of your relatives. You need to live with it, and resolve your feelings to the reality of that situation.

You don't get a choice if your uncle, grandmother, aunt, niece or son share their DNA with law enforcement.

I'm not sure it's just feelings to be resolved. The problem is that even DNA matching, especially the SNP genotyping which tends to be used by consumer ancestry and heritage services, is not perfect. So your daughter can end up false-positively matching to a crime 20 years from now due to your uncle submitting his own DNA last year without you ever knowing. I'm not sure how anyone sufficiently familiar with the implications can just get over it and accept the reality of the situation. It is by no means an easy problem to solve.

That’s very true but it’s more of a criminal justice problem than a privacy problem. The same issue could happen (and has) with fingerprints or other biometric data.

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