If you're a state actor (Russia, China etc.) that has a sufficient funding / motivation to take a dataset like this and systematically blackmail people in it for information, it seems naïve to think that those states haven't had this sort of information for decades already through traditional espionage methods.
nation-states had the power of bulk collection and bulk processing 30 years ago, the difference is now you don't need a human to copy the data to a disk and walk off with it.
