[foobarqux]

If the interview casts Snowden in a positive light then the government would probably be unhappy to have it highlighted in the media.

The government uses implicit threats of retaliation as deterrence.

[ZenPro]

Source / Proof?

[foobarqux]

For which part? That a sophisticated, powerful entity is opposed to circumstances that will disadvantage them or that they will act to prevent other parties from causing those circumstances from occurring?

[ZenPro]

You never said that. Please don't redirect.

You made an assertion. Back it up.

[foobarqux]

Again, which assertion?

That the government doesn't like Snowden being cast in a favorable light or that it uses mechanisms to deter people from doing so?

A good place to start for the latter is chapter 1.3 of "Manufacturing Consent"

http://www.scribd.com/doc/190262164/Manufacturing-consent

[foobarqux]

And here is quote from Pilger describing a specific admission of media manipulation by a major government:

[A former British official] described how the Foreign Office manipulated a willing media. "We would control access to the foreign secretary as a form of reward to journalists. If they were critical, we would not give them the goodies of trips around the world. We would feed them factoids of sanitised intelligence, or we'd freeze them out."