Like anything that stands still long enough, railroad rolling stock suffers graffiti too. Some of it is a shame, some is so good it's art, as demonstrated in these cool photos! Perhaps the railroads should hire some of those guys to decorate the cars, like building owners, who hire graffiti artists to do murals (to avoid graffiti, since its an "honor among thieves' sort of thing, where one artist won't "tag" another's already tagged work).