That is a pity.
Where I live, there is hardly any graffiti, but we do have really nice murals - no one dares to deface. They are all on the theme of the place (sunny beaches, sailing, nature, birds, etc.). Though done by different artists, the theme is upon the approval by the town council. I have no idea what prices these mural paintings cost. It would be a shame if the artist got less than what a sign-painter would charge. And their charges are not cheap.