Earlier quoted context omitted.
This is all publicly available information. You don't give up your right to free speech when you gain access to sensitive information. He probably vetted this content very carefully and had several friends within the intelligence community review it for him to ensure he wasn't revealing anything undisclosed to the public already.
He's been termed as an NSA whistleblower though. How can one be a whistleblower on publicly available information?
All of this under the banner of state secrets justifying these actions. Whereas in any corporation or visible branch of government the waste would have been a scandal. In the NSA the use of state secrets means power concentrates and individual employees have little recourse (Snowden, etc.).