The Patriot Act has already defined everyone on this thread as a terrorist.
'Any group, organization, individual or individuals who have ever had the intent, to cause harm to another human being, or to cause significant property damage' is legally defined as a terrorist. Note it says intent; you don't even have to do anything.
If you are a terrorist, they can revoke your citizenship. If you are not a citizen, they can kick in your door at 3am, put a bag over your head, and hold you in a secret location indefinitely without charging you with a crime. You just disappear. Legally. You don't get to defend yourself against the charges because there aren't any. This is all in the Patriot Act, and it's gotten much worse since.