According to Stowers (2005) some graffiti artists view their art as a bad deed against politically and economically orientated authorities.
“For some artists see themselves as revolutionaries reacting against the established art market or gallery system in that art is not only that which appears in the gallery as determined by the curator” (Stowers, 2005).
Some artists also view their creations on public and private spaces as a statement against Western ideas of capitalism and private property (Stowers, 2005). Of course, the majority of graffitists enjoy what they do and find it to be fun, rewarding, and exciting (Stowers, 2005). Although these reasons are valid, they do not settle the matter as to why graffiti art is art or why it is a legal art form nevermind its illegal origins (Stowers, 2005).
Stowers, G. 2005. Graffiti Art: An Essay Concerning The Recognition of Some Forms of Graffiti As Art. http://www.graffiti.org/faq/stowers.html [08 May 2012].