I love the view of Graffiti as the “peoples version” of controlling the visual environment in urban areas. As some famous artists/writers have put it, why should only those with money be allowed to control what we see and how oir cities look? One awesome example of this is Berlin Kids, who have managed to control the appearance of an entire area of Berlin with their artwork.
If they want to tinker, but dont want to install arch from scratch, endeavour is the way. If they want their system to just work, they should go with Pop!.