Yes,of course. Anyone who does not follow the government's line is a danger to the homeland, free speech be damned.
Yesterday, the Prez said that our actions in Iraq reminded him of the founding generations actions in the revolutionary war. More accurately, President George's actions remind me of King George's actions of that time.
Warrantless searches and detaining people without due process.
Gun control such as was attempted at Lexington and Concord.
Regulating trade and economic activity.
Out of control government spending
Bypassing trial by jury, habeus corpus and due process
With a little research, I could probably add to this list but you get the idea.
Free speech? In many real ways freedom of speech is a myth because it has been negated by other laws of the land.
The 1st Amendment right to free speech is a worthy ideal, but it will never catch on and, in fact, we are steadily moving further away from that ideal. Saying what you believe can get you in hot water, can inhibit your career potential, can get you ostracised, can get you fired, can get you sued, can get you labeled as a bigot / hater / intolerant / homophobe / etc, can lose you an election, can scar you for life, can get you dead,......