The document discusses the controversy around street art and graffiti, exploring whether it should be considered vandalism or a valid form of artistic expression. It introduces the concept of "yarn bombing" as a type of street art that is non-permanent and can be easily removed, using colorful yarn to decorate public spaces in a way that may be less offensive than traditional graffiti. The document proposes a project for students to collaboratively create a yarn bombing installation and discusses criteria for evaluating the project.