"the data is anonymized"
But, it's DNA. And, partly thanks to the Mormons* and other credulous numpties, there's open source genealogy and DNA all over the internets. So, it's not beyond the wit of man to see it's possible to link the DNA in this database to gullible family members. Ask the Golden State Killer.
*LDS members like to baptise dead relatives. So, they love ancestry.com and ancestryDNA. The fact that these companies are based in Utah is blind coincidence.
p.s. I'm not making this up.