To avoid repeating the ...

To avoid repeating the mistakes of the past, an alert citizenry today should take the trouble to learn how easy it can be for a powerful minority to manipulate information to win the support-or the indifference-of the majority towards an action.
 Randal Marlin

Quotes from the same author

The special harm attaching to prior restraint is that the government can keep materials from reaching the public, so there can be no accountability, no judgment by the people that the power to suppress was wrongly exercised.
 Randal Marlin
Down to the present day the luminous image of democracy has often served as a pretext for the most undemocratic actions.
 Randal Marlin
When you give false information you tend to restrict the freedom of choice to others.
 Randal Marlin
Any restrictions to freedom of expression will always open the door to possible others, because analogical reasoning can mount arguments showing why this or that class of objects is closely similar to those for which exceptions have been made.
 Randal Marlin