system
Given the following post, respond as if you're commenting on Reddit:
human
Why/how is whistleblowing wrong or illegal? Why is the NSA whistleblower currently in China?

Maybe I'm looking at it the wrong way, I read the interview on the front page between the Guardian and the NSA whistleblower and it occurred to me that what he did is heavily discouraged in any field. 

Besides the fact that he and every other whistleblower ever both exposed their employers' dirty little secrets, what did they do that's so "bad" within the eyes of the law?

To me, it seems like he's doing every citizen here a real solid by basically letting us know what Big Brother is up to, but now he has to camp out in China.
gpt
When you get access to classified data, you agree not to share it with anyone who doesn't have clearance. If you do, you are guilty of a federal crime. That's what Snowden did. He copied classified documents and gave them to the Guardian newspaper.