It's neither. While some graffiti has elements of artistic flair, it serves as a gang advertisement or newspaper. Graffiti not only marks a territory a gang has claimed; it also serves as a warning and challenge to other gangs. Graffiti, depending on how it is written, can also honor a fallen comrade (usually with a tombstone or RIP), list the street names of gang members, and show opposition and disrespect for another gang. Also, gang graffiti should be reported to the police. The police may wish to photograph the graffiti so that they know which gang is operating in which area. Also, graffiti removal should never be done by one individual. Gangs have been known to retaliate against individuals painting over their graffiti. Again, there is safety in numbers.