In 15 minutes of reading I've found personal communications, medical issues, people confiding in a friend over marital problems, etc.
This is 2015. People use their work email for personal communications. Should they? Probably not. However, any reasonable person knows that most people do this.
Sony isn't going to get "destroyed" over this, sorry. A bunch of innocent mid-level employees just trying to support their families just got wrecked, though! Woo, we did it internet!
As someone who considers himself far-left leaning, this shit just embarrasses me.