i understand where you're coming from when you say "denying business with them"... but i believe that approach is taken because it is such a bottoms-down regime. because any business invariably gets approved by the regime and simply benefits the regime. it's not like a dissident is allowed to live there disconnected with the government and do business independently and start a voice/party to challenge the status quo -- that business man is there because the government allowed him to exist and he knows it.