Censorship is the suppression of speech or other public communication which may be considered objectionable, harmful, sensitive, or inconvenient to the general body of people as determined by a government, media outlet, or other controlling body.
The rationale for censorship is different for various types of information censored:
  • Moral censorship is the removal of materials that are obscene
    An obscenity is any statement or act which strongly offends the prevalent morality of the time, is a profanity, or is otherwise taboo, indecent, abhorrent, or disgusting, or is especially inauspicious...

     or otherwise considered morally questionable.

"Assassination is the extreme form of censorship."

George Bernard Shaw|George Bernard Shaw, s:The Shewing-up of Blanco Posnet/PrefaceThe limits to toleration|"The limits to Tolerance", in preface of s:The Shewing-up of Blanco Posnet|The Shewing-up of Blanco Posnet

"Censorship ends in logical completeness when nobody is allowed to read any books except the books that nobody reads."

George Bernard Shaw|George Bernard Shaw

"All censorships exist to prevent anyone from challenging current conceptions and existing institutions. All progress is initiated by challenging current conceptions, and executed by supplanting existing institutions. Consequently the first condition of progress is the removal of censorship."

George Bernard Shaw|George Bernard Shaw, Preface to Mrs. Warren's Profession

"Censorship reflects a society's lack of confidence in itself."

Potter Stewart|Potter Stewart

"The Internet treats censorship as a defect and routes around it."

John Gilmore|John Gilmore

"If we don't believe in freedom of expression for people we despise, we don't believe in it at all."

Noam Chomsky|Noam Chomsky

"Don't join the book burners. Don't think you are going to conceal thoughts by concealing evidence that they ever existed."

Dwight D. Eisenhower|Dwight D. Eisenhower, Speech at Dartmouth College|Dartmouth College (14 June 1953)