Free speech has nothing to do with democracy.
The limits of speech are afforded to me by the sovereign. If tomorrow GW Bush decides there needs to be some homeland security then every phone gets tapped and you lose your freedoms. That easy.
And before you say constitution remind me how a piece of paper stops a sovereign from becoming more authoritarian? How do you vote the guns out of the hands of the authoritarians that will be using those guns to control you. As well as other means .