Lerners LLP, with offices in London and Toronto, has a web space called LERNx, where they post opinions about the law. There are several that will be of interest to citizens seeking to dispute decisions made by municipalities and want to know about their right to do so. Listed below are a couple of articles on freedom of expression. There are others that may also be of interest.
http://www.lerners.ca/lernx/municipalitys-trespass-notice-trespasses-citizens-freedom-of-expression/