Yeah, but what does that have to do with random unassociated outside observers? Are you saying society at large has some kind of right to intimate details of personal relationships?
I'm saying it's impossible, especially across large populations, to assert that infidelity is wholly a private matter. It's a compelling notion that doesn't stand up to facts. Be sure to consider things like STD rates, unplanned pregnancy rates, rates of single parenthood, divorces resulting from infidelity, and so on.
I can assert that this data breach is immoral while also asserting that infidelity, especially organized infidelity, is not simply an intimate detail. I'm not sure why everyone feels compelled to square off into two camps on every issue.