i see this as no different than Facebook, Twitter or any other internet outlet (including this forum).
If you don't want people to know (or find out) about it, don't do it on the internet. It is NOT secure or private in ANY way.
I see this as very different than Facebook or twitter. They are not just releasing names, they have credit card information also. At that point it is identity theft not just embarrassment. While I may not agree with the sites morals, I do believe hackers like this are worse for our society. They claim justice from behind a computer while ruining people's lives and costing us millions per year. At the end of the day the credit card company pays for it while passing those costs on to each of us.