I find Wikipedia a great data base giving information which no other encyclopedia would give.
I do my bit when somebody tries to mutilate (not edit) an article by, for instance, deleting whole paragraphs or links just because he/she does not like it.
Censorship under the military dictatorship in Brazil consisted of restrictions on the media, artists, journalists, and others which the government deemed "subversive", "dangerous" or "immoral". The political system of the Brazilian military dictatorship, installed by a 1964 coup d'état and which persisted until 1985, also set out to censor material that went against what it called "morality and good manners". The constitution of 1967 established censorship as an official, centralized activity of the Brazilian federal government. There were several protests against the practice, including the Cultura contra Censura protest in February 1968, depicted in this photograph, which shows the actresses Tônia Carrero, Eva Wilma, Odete Lara, Norma Bengell and Cacilda Becker.Photograph credit: unknown; restored by Adam Cuerden