Currently Online 
The website didn't respect their customers or take security seriously, it seems. A lot of the users are idiots with little respect for others, while others are innocent. At the same time, every single user is a victim, and every hacker involved is a criminal. That said, because a large portion of the users are probably idiots, I also understand the hackers. Still, I don't think it's acceptable to hack sites. The site is immoral but not significant in any greater sense. I'm all for hacking stuff for ethical reasons but I think the positives outweigh the negatives only at a scale greater than this. It's not like Ashley Madison was working against human rights or anything.
And just for the record, as far as I know, Ashley Madison never validated the email addresses registered there. That means anyone could have registered any email address there for any reason. That means every single one of you is potentially on the list of Ashley Madison users. It's unlikely but possible.
