Cheers for the King in Athens

At least some ordinary Greeks apparently agree with my previous post. Australians for Constitutional Monarchy reports that truck drivers demonstrating in Athens, surprised to see King Constantine and Queen Anne-Marie, regaled them with cheers, calling for them to return to the throne and throw out the politicians. But can monarchists capitalize on such spontaneous events and overcome the formidable obstacles republics (which are far more intolerant of monarchists than monarchies are of republicans) place in their way?