seditious[səˈdiSHəs]

inciting or causing people to rebel against the authority of a state or monarch.”the letter was declared seditious”synonyms:rabble-rousing · inciting · agitating · fomenting · troublemaking · provocative · inflammatory · agitational · revolutionary · rebellious · insurrectionist · mutinous · insurgent · subversive · insubordinate · civil disobedience · dissident · defiant · disloyal · treasonous

Cite: http://www.freedictionary.com