Edit: although I also disagree that discussions of ethics and morality are off-topic for HN.
Here's a proposition that I think is on-topic that we can discuss: It is, IMO, clearly irresponsible and reprehensible to go around encouraging people to break their marriage vows and then not take world-class care of the database listing the people you so encouraged. If you can't find qualified people to take world-class security measures, maybe you shouldn't be running the site at all.
It's reprehensible for any third party to go around encouraging people to break any sort of vows between any two people, and it's irresponsible for any online site with a large userbase to not take world-class care of their database. Why should the two propositions be connected?
To me, it's not more irresponsible because of the nature of the site, and it's not suddenly more reprehensible because they got hacked. In addition, I would say that leaking the database is more reprehensible than the site itself ever was.
(Some people will feel that this is balanced out by the fact that these are Bad People, who deserve to have their badness exposed. If so, failing to protect the database might have been less irresponsible and reprehensible in AM's case. But it would be quite a coincidence for these things to balance perfectly. One way or the other, the service you're providing to your customers makes some difference to just how awful it is when you fail to keep their data private.)
Hm; do you really think there's a chance the company will survive this? It seems unlikely.
I do wish there was a way to distinguish between "Your facts are wrong," "I disagree with your opinion," "You're off-topic," or "You might be right and on-topic but you're not constructive" when downvoting, especially since HN norms are that the first two are appropriate uses of the downvote button. (I don't think it's very likely to be the last one, in this case.)