Ruining marriages? These marriages were already fucked, those emails didn't register themselves, while I think any kind of doxxing like this is a concern the people involved in this certainly aren't victims. They're simply corrupt and hypocritical people getting themselves into trouble.
It was only a matter of time.
It was only a matter of time, someone elses hack is a treasure trove of data to comb through and information to gather.
Add in a few other hacks (Targets webhack etc.) a list of names and profiles then combine the databases and look for matches to a Visa number and poof credit card fraud and identity theft become a lot easier.
I did find it amusing though that paying to delete a name from the Ashley Madison database did not do a lot, the feds will have a fun time looking at peoples dirty laundry I guess, not really a NSA related topic but as an extension that database is free for downloading and adding to their data coffers.
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That said Have I been Pwned is the perfect domain name to squat for a database lookup ^_^.