Illegal acts against people considered "deserving" is vigilantism, which is bad.
They also aren't guided by morals at all. Anyone with half a brain can figure out that releasing this data would have massive life-ruining repercussions for both good and bad people. Applauding the hackers is incredibly naive, unfortunately that seems to be the theme of this thread.
If you allow individuals to take the law into their own hands, without counsel maybe one time in 100 you'll get an Edward Snowden, the other 99 will be the kind of people who beat up trans kids.