Please reiterate why it's bad idea to have DNA testing done to determine family lineages?
It's a bad idea because the DNA research company in question is sponsored by a shadow organization that is looking for the "god gene". What they intend to do with the people who have it, is not pleasant. It's best that you realize that your DNA is the sacred temple of your godhood and guard it as carefully as possible (use the Light Explosion Protocol daily).
What can one do regarding their DNA sample out there, should they have already had their DNA tested?
Do the protocol — it creates a shield of invisibility against ill intent. Do this daily for a month.