Ancestry DNA databases can be used to find you — even if you don’t sign up
I'm not worried so much as the law enforcement or the government tracking you down aspect as I am about the private sector aspect.
A hypothetical future scenario where you are applying for a job or trying to get insurance and some company checks one of these online databases they've bought access to like they do to social media databases. Then even if you've never used them they do a database search and find your relatives that have histories of medical conditions. Now you might not have these conditions at all but that might not matter if the company does a risk assessment and it does not favour you.
So many people have now used the services that many of us don’t even need to share our own DNA to be tracked down. Your father — or perhaps a third cousin whom you’ve never even met — could have uploaded their data, which could lead to you. This is how police cracked the cold case of the “Golden State Killer” earlier this year: An old DNA sample from a crime scene matched with the DNA of the killer’s relatives in public databases, which, after some more sleuthing, led to him.
I'm not worried so much as the law enforcement or the government tracking you down aspect as I am about the private sector aspect.
A hypothetical future scenario where you are applying for a job or trying to get insurance and some company checks one of these online databases they've bought access to like they do to social media databases. Then even if you've never used them they do a database search and find your relatives that have histories of medical conditions. Now you might not have these conditions at all but that might not matter if the company does a risk assessment and it does not favour you.