The current era in graffiti is characterized by a majority of graffiti artists moving from subway or train cars to "street galleries." The Clean Train Movement started in May, 1989, when New York attempted to remove all of the subway cars found with graffiti on them out of the transit system. Because of this, many graffiti artists had to resort to new ways to express themselves. Much controversy arose among the streets debating whether graffiti should be considered an actual form of art.
During this period many graffiti artists had taken to displaying their works in galleries and owning their own studios. This practice started in the early 1980s with artists such as Jean-Michel Basquiat, who started out tagging locations with his signature SAMO (Same Old Shit), and Keith Haring, who was also able to take his art into studio spaces.
In some cases, graffiti artists had achieved such elaborate graffiti (especially those done in memory of a deceased person) on storefront gates that shopkeepers have hesitated to cover them up. In the Bronx after the death of rapper Big Pun, several murals dedicated to his life appeared virtually overnight;similar outpourings occurred after the deaths of The Notorious B.I.G., Tupac Shakur, Big L, and Jam Master Jay. Princess Diana and Mother Teresa were also memorialised this way in New York City.
With the popularity and legitimization of graffiti has come a level of commercialization. In 2001, computer giant IBM launched an advertising campaign which involved people in various states spray painting on sidewalks a peace symbol, a heart, and a penguin (Linux mascot), to represent "Peace, Love, and Linux." However due to illegalities some of the "street artists" were arrested and charged with vandalism.
Along with the commercial growth has come the rise of video games also depicting graffiti, usually in a positive aspect -- for example, the game Jet Grind Radio tells the story of a group of teens fighting the oppression of a totalitarian police force that attempts to limit the graffiti artists' freedom of speech. Following the original roots of modern graffiti as a political force came another game title Marc Ecko's Getting Up: Contents Under Pressure which features a similar story line of fighting against a corrupt city and its oppression of free speech.
Mark Ecko, an urban clothing designer, has been an advocate of graffiti as an art form during this period, stating that "Graffiti is without question the most powerful art movement in recent history and has been a driving inspiration throughout my career."
Modern graffiti is often seen as having become intertwined with Hip-Hop culture as one of the four main elements of the culture (along with the Master of ceremony, the disc jockey, and break dancing), through Hollywood movies such as Wild Style. However, modern (twentieth century) graffiti predates hip hop by almost a decade and has its own culture, complete with its own unique style and slang.
For example, a famous graffiti of the 20th century was the inscription in the London subway reading "Clapton is God", in reference to the guitar skills of Eric Clapton. The phrase was spray-painted by an admirer on a wall in an Islington Underground station in the autumn of 1967. The graffito was captured in a now-famous photograph, in which a dog is urinating on the wall. Similar approvals or disapprovals of musicians have continued since, for instance, the summer 2007 inscriptions in Harlem reading "50 Cent is Wack". A popular graffitos of the 1970s was the legend "Dick Nixon Before He Dicks You," reflecting the hostility of the youth culture to that U.S. president. The belief that graffiti and hip-hop are related arises from the fact that some graffiti artists enjoyed the other three aspects of hip-hop, and that it was mainly practiced in areas where the other three elements of hip-hop were evolving as art forms. Graffiti is recognized as a visual expression of the rap music of the decade, as breakdancing is the physical expression. Graffiti also became associated with the anti-establishment punk rock movement beginning in the 1970s. Bands such as Black Flag and Crass (and their followers) widely stenciled their names and logos, while many punk night clubs, squats and hangouts are famous for their graffiti. Via HYB