It would be cool if we could do graffiti, just like how custom images work with Sketchbook Page, which would initiate even more store use (nice hey devs?)
Like being able to paint boulders, sides of houses and palisade walls, brick walls (those are still in teh game right?), inside the cave on cave walls (of course once mined the graffiti would be dissapear). But I bet the community would love to splatter images all over flat surfaces, also would require Sketchbook Page from store per Graffiti image using whatever or multiple dyes or heck also experience points to paint a mark onto the world, just like cave paintings.