So after reading the orignial post, i tried to figure out what exactly could be so bothersome. I came up with one conclusion. Cuz this bothers me too:
After walking on sidewalk chalk, the dust of the chalk clings to your shoes which then leaves chalk-footprints all over my floors. Therefore i told my children that if they want to color with chalk they have to color in a place that people dont walk. They usually color in my yard but not in the area that goes from the public sidewalk to my front door.