Tung Hoang's post on Goodwall - Green Sphere - Come with me (P1) This day, I was cleaning up the commercial notes that were glued into public infrastructure. It was a surprising experience. I did not expect that the local people in that area all face us advice on how to remove it better. This suggested that they have seen multiple advertisement notes being removed before and this was a recurring problem. I was glad that I had helped to clean up the community. However, at the same time, I was worried that the problems will resurface and I could not help then.