5. Snowden could have aired his concerns internally rather than leaking the documents.

I’ve interviewed many NSA whistleblowers, and the common denominator is that they felt ignored when attempting to bring illegal or unethical operations to the attention of higher-ranking officials. For example, William Binney and several other senior NSA staffers protested the agency’s domestic collection programs up the chain of command, and even attempted to bring the operations to the attention of the attorney general, but they were ignored. Only then did Binney speak publicly to me for an article in Wired magazine.

In a Q&A on the Guardian Web site, Snowden cited Binney as an example of “how overly-harsh responses to public-interest whistle-blowing only escalate the scale, scope, and skill involved in future disclosures. Citizens with a conscience are not going to ignore wrong-doing simply because they’ll be destroyed for it: the conscience forbids it.”

And even when whistleblowers bring their concerns to the news media, the NSA usually denies that the activity is taking place. The agency denied Binney’s charges that it was obtaining all consumer metadata from Verizon and had access to virtually all Internet traffic. It was only when Snowden leaked the documents revealing the phone-log program and showing how PRISM works that the agency was forced to come clean.