Anonimity

"Anonymous pamphlets, leaflets, brochures and even books have played an important role in the progress of mankind. Persecuted groups and sects from time to time throughout history have been able to criticize the oppressive practices and laws either anonymously or not at all... It is plain that anonymity has sometimes been assumed for the most constructive purposes."
--Justice Hugo L. Black (1886-1971) US Supreme Court Justice
Source: Tally v. California, 1960