A lot of times it doesn't matter if graffiti is legible or not. It's more about mark making, addressing the environment where the tag is, composition (specific examples coming up later), rhythm, pattern, color, etc. Rhythm and pattern are frequently disregarded in mainstream "art," which I think is one reason graffiti is frowned upon... people genuinely
don't get it. Legibility is an afterthought, the letters they've chosen give them different visual possibilities. One tagger (graffiti artist) friend of mine just has a nonsense name with a coupld of numbers in it. I asked him why, and he said, "You can do some sweet things with a '4'. "
Art is easier to handle when it's in a small scale, in a location the viewer selects - museums, galleries, books, etc. You can address it at your leisure and never feel threatened by the little discount reproductions you bought at Barnes and Noble. You chose to view them, so you have some kind of selective power in the viewing.
Graffiti doesn't always work like that. Mural sized graffiti is too big to ignore. As a viewer, that threatens you. It's like you didn't give your consent. And in America, the land where property is so easily equated with personal rights, having your property altered without your consent can be kinda traumatizing.
Well, outside the possible ethical issue of property rights, it's still art. Outside of the loose definition that taggers are consciously producing or arranging colors, forms, or other elements in a manner that affects the sense of beauty, specifically the production of the beautiful in a graphic or plastic medium, taggers also conform to the more strict/pretensious visual art qualities that apply to painting, drawings and murals. (thanks dictionary.com for the verbose definition of art). :p
Example 1 - the mailbox image attached. Look at the rhythm, the way the marks direct your eye from any point they enter the large word at the bottom, and direct them across the entire image. It's not a pile of twigs, it wasn't randomly selected. Just check out the way the graffiti addresses the borders of its support (the mailbox) in a more conscious way than I see a lot of painting these days do. Its placement and its form are not accidental, it was "produced/arranged in a manner that affects the sense of beauty."
Example 2 -
this large mural This one is really stunning.
The organic forms of the graffiti interact wonderfully with the geometric boundries the wall has set for it. Also look at the contrast between the red and the green of the tree - this color relationship is almost certainly not accidental, as the graffiti was probably put up shortly before this picture was taken and they rarely last long afterwards. Can you read what this one says? Maybe. Does it matter what it says? Not at all.
There is, of course, graffiti that does nothing more than try to bring its maker some kind of demented fame by spreading around the poorly written nickname they've chosen. To be fair, a lot of "high art" is like this as well. There are pretensious painters, dancers, actors, musicians.. and there are pretensious taggers as well. Like any art form, people get into it for different reasons. Hopefully I elaborated on some of the more noble ones. :p