You're absolutely right. People who signed up for Ashley Madison were making choices that I don't endorse or even like on a personal level.
But they were not breaking the law. They were hoping to engage in activities that I personally find reprehensible, but that's not a justification to publicly shame someone and to release their credit card information.
Hulk Hogan was cheating with his friend's wife. Do I approve of this legal behavior? Absolutely not. But Gawker didn't have the right to publish the sex tape without his consent as a result of his lapse of morality.
The (mostly) women involved in that release of hacked photos: do I think it was a good idea for them to take nude pictures of themselves? Absolutely not. (Not that I believe there's anything dirty about the human body.) Those hackers had no right to subject these women to public shame and embarrassment for their lapse of judgment.