“And the corollary is that if you send in your DNA for a genealogy you may find some family member arrested for a crime they had previously gotten away with.”
Right. If you have murderers in your family and you don’t want them to get brought to justice — you may not want to submit your DNA.
If they murdered Abortion providers, child rapists, or brutal fascists, I certainly would not want them caught through my DNA.
People need to consider a future in which "crime" is not what normal people currently regard as crime. The Social Justice Warriors keeps expanding the definition of what is a "crime", and it may eventually be a crime to speak out against them.
When you have to leave off part of a tongue in cheek reply to disguise it’s sarcastic nature, your pretentious outrage is purely virtue signaling.