Toronto got hacked on June 7th, but it was its public spaces that were affected, not its computers. The code of a city is written in its rules, regulations, bylaws, prohibitions, and the cans and cannot-dos of our streets, parks, and sidewalks. Pedestrians belong on the sidewalk, cars on the road. This area reserved for dogs. Don’t walk on the grass. We experience the city and our public spaces passively most of the time, letting the code dictate our behaviour. But what happens when you become an active participant and change the rules? What if you insert new code?