Anyone dissenting against the Government can be labelled a 'terrorist' ...
All they have to do is prove it, and with the means , I'm pretty sure they can 'get evidence' against you if you know what I mean

A tea party protester claims he was investigated as a terrorist by the Joint Terrorism Task Force of the FBI after he sent letters to his representatives criticizing the government for spending money he says the U.S. does not have.
Shirk said he will do anything in his power to make sure that elected officials who disregard the public's wishes and fail to govern according to the Constitution are removed from public office.
But Shirk claims that on April 23 he was visited by the Joint Terrorism Task Force of the FBI. He said Sen. Sheldon Whitehouse, D-R.I, reported to the FBI that he was endangering the government and should be investigated as a suspected terrorist.
Shirk said the more he thought about the incident, the more he became upset.
"Is this where we are headed?" he wrote. "Is this the Socialistic Fascism the current majority is pushing on the American people to be followed by not only political Fascism, but tyranny at the hands of our Federal law enforcement agencies at the direction of political hacks? Is this the last of it, or am I now identified somewhere as a terrorist threat to be watched?"