There are two kinds of media censorship: direct and self-directed.
In an authoritarian regime, nothing gets published or broadcast without state approval. I watched the inner workings of direct government control of the press during a visit to Turkmenistan. Every magazine and newspaper was run out of the same office. Many were edited by the same people, all wearing the same lapel pins, an image of the country's then-dictator, Sapamurat "Turkmenbashi" Niyazov.
This didn't exactly make for a bunch of scintillating reads: the "our harvest rocks" stories were direct heirs of propaganda in the Soviet Union, of which the Turkmen SSR was a remote outpost. But it did offer clarity. The Turkmen people have never suffered from any illusions about the nature of their political system. They knew they weren't free.