Only when we were in the event of community engagement in Lowell is that I understood why we had to glue our boards of our work in cardboard. A good planner organizes good community meetings. Unfortunately, a big part of the activity of an urban planner in the US is deemed to be the promotion of the community participation in the decisions of the city. That explains the number of hours invested in the setting up of a building for displaying our works and having the residents of the target city come and ask us about them. Naturally, community participation is of critical importance in the management of a city. However, I question the necessity of an urban planner going to the small details of the organization of an event for the people, whereas the same level of detail is not expected in the analysis of the legal framework of an instrument or of its economic impact.