Censorship

Censorship is the act of preventing or the controlled revision of specifically defined ideals, concepts, images, or messages from being available to a given population. For example, the "great firewall" that is run by the Chinese government, is a means to control the influence of outside politics from entering the country through media and information channels, such as the internet.

Additionally, censorship can also be employed by corporations in order to shape public perception. Legal means such as Non-Disclosure Agreements, information security classification(Top Secret, Secret, Classified, For Official Use Only), and contract stipulation can provide legal ramifications for violating terms of agreement that specify what can or cannot be said.

Viewpoint

The prominence of censorship can be always debated depending on the position, viewpoint, and motivation of the parties involved in the dispute. It may be difficult to prove censorship claims as evidence supporting this position is usually a pre-requisite. But what if the evidence itself is censored? This makes a claim even more difficult to prove. Such cases are highly ambiguous, and would most likely warrant an investigation to prove any element of wrong-doing.

Advocates

In some situations, organizations or individuals that are self-tasked with promoting "appropriate social norms" may seek to promote censorship in certain realms. Jack Thompson, for example, started a public advocacy campaign against violence in video games in order to promote censoring of the kinds of content depicted in them for youths.