Censorship

Censorship is the act of cleansing out unwanted content. This method is (or was) used by every single place in history. The majority of censorship takes place to secure a good image, in order to the world seem less evil.

It just about comes in every single form, even if it is not wanted. Of course, some governments could care less and would rather have their citizens lead a perfectly clear path, with no negative associations involved.