The hacks caused some embarrassment, that's all. If you don't want to be embarrassed by what you write online don't write embarrassing things online. Online communications are not private. Don't we get upset when adolescents get embarrassed by what they do online? Shouldn't we also be upset that media barons don't realize they are responsible for what they put online. Revealing the e-mails is upsetting, but it is also the kind of thing that happens on a pretty regular basis. Also too, don't put nude photos online - if you don't want anybody to see them.
What is costing Sony $100,000,000 has nothing to do with the Internet. It is people threatening to blow up theaters if they show the movie. Let's put aside the fact that it's probably not a good idea to poke a paranoid schizophrenic in the eye with a stick - good things rarely come of that. Take a friggin trip to South Korea and talk to three people before you decide to make a movie about North Korea. An eight year old could have told you what might happen!!!!
This threat itself is pure North Korea - it is almost Neanderthal in nature.
It has always been possible for people to threaten to blow things up to stop other people from doing things they don't like, or to tell people what they want to tell people. See abortion clinics for instance. I'm sure public spaces get bomb threats everyday if they don't do xyz. What changed? I'll tell you what changed, we have been trained to piss in our pants every time a crazy person says bomb. We get hysterical. This is the end result of decades of fear mongering. The other thing that has changed is less and less people are following the social contract. We don't follow the social contract any long (see torture) why should anybody else.
So you know what caused Sony to lose $100,000,000? The fact that their executives are idiots without the slightest understanding of world events. Terror levels and terror hysteria (ISIS members coming across the border disguised as poor central American children!!). And the fact that we don't give a crap about anybody else anymore so why should they give a crap about us.