The concept of "Inciting a Riot" is one of the more obvious overreaches to control distasteful groups that leads us down the path of thought control (vis a vis postmodernism or original economic stratification). If someone is so ignorant or intent that they take an unlawful action due to spoken or written word, they had problems before. The edge cases are something more akin to accomplice. Those "rioter" problems were historically in education/comprehension (ironically something the internet has helped with in many cases) or mental defect or justified outrage. Because capitalistic and social opponents could not affect the changes they wanted or changes fast enough, the idea of a riot was born as a club. Even in america, the right to assemble is curtailed by the judicious application of this opposing legal construct.