THOUGH NOT THE largest or most urban city in Canada, Ottawa is no stranger to the colourful world of graffiti art. Some adore it and others abhor it, but what but what does graffiti really say about our city? Point: All the graffiti Living in Ottawa, we see graffiti all the time, but rarely do we get an opportunity to truly enjoy it. Every week, Rick Mercer shows a different Toronto alley during …