I found a lot of pictures graffiti alphabets in google image search. at the first page of google invention there are several pictures that I liked. graffiti alphabets among others, are as follows.
next picture was taken from a few blogs that discuss graffiti alphabets. graffiti maker also came from several countries, including Indonesia. and this picture of a picture graffiti alphabets.
image below is also a picture of other alphabets graffiti that I found on google search pages.