How easy is it to submit random DNA (cow, cat, dog, chicken, etc. or even fake?) and get yourself enrolled in their system to then legitimately have access to the next 1500+ "relatives?".
Given a few grand to spend on testing kits I reckon you could get the same results stuffing this DNA, as this "golem" guy did by credential stuffing.
23AndMe made the classic mistake to assume that biometrics are a type of authentication and allowed anyone to access the records of 1500 other people just by submitting some DNA....