Sedition is illegal. Sedition is planning or plotting against the government. It’s illegal even if you haven’t done anything - planning is enough.
You’re right about that, but the burden of proof is high and actual sedition is difficult to prove because it is impossible to measure one’s “intentions”.
Only Tom Crusie fights crimes that have not occurred, and then only in a movie.
So when are they going to arrest the ‘Bald Communist’?
http://www.youtube.com/watch?v=hEEtScHIC1U&feature=related