Until about ten or so years ago, it was actually quite difficult to publish or broadcast to the world. You could perhaps hire a vanity publisher, or produce pamphlets and hand them out in your High Street. Or you could start a pirate radio station. But, in general terms, the means of publication and broadcast were in the hands of the few, not the many.
You may have been able to share your ideas or information with your friends, or write letters to distant correspondents; but there were real and substantial checks on you circulating what you had to say to the public at large. The best you could perhaps hope for would be a letter to the newspaper, published at the behest of the editor, or a call to some phone-in programme, which could then be cut off any moment.
via New Statesman.