The use of proportionality reasoning to determine whether there has been an actionable breach of constitutional rights is spreading around the globe. Except in assessing the constitutional validity of legislation claimed to infringe the implied freedom of political communication. If, as claimed in its favour, proportionality reasoning can promote transparency and accountability, should it be more widely adopted in this country; or is it in all respects an exotic jurisprudential pest? By explaining the concept, its legal history, and the staged reasoning of structured proportionality,