Graffiti ?

Reading the first few lines in "Bombing": Brooklyn Graffiti, Language and Gentrification, I hadn't thought much on how Graffiti can incorporate in really being relevant to 21st century literature. Reading on through the first few pages however, it was said that these "tag" names represent more than just vandalism, but can have more of a representation of who you are. Like in many of the arts, when you travel and witness these "works" they tend to vary in design. One particular instance where this caught my eye, was through a memory, when I had traveled to Puerto Rico about ten years ago for vacation. I don't remember much, but I do remember the vandalism throughout neighborhood streets. How it was different to that of the streets in Brooklyn, which I would see when I would come to visit my grandfather. Well graffiti is graffiti, but it was different in terms of style at least. In conclusion I guess there is a lot more to say about this new found way of representation and art.