[a_136_chiffa]

If they don't find your data, they will likely use your relative's data to infer the risk. I doubt your cousins, uncles and aunts would think twice before signing up with their real names to one of the "find where your ancestors came from for $69.99!" adverts.

This industry should be heavily regulated and have engineered security layers making sure you always know where your data is, who has or had access to it and how it can be used.