The graffiti movement started in Philadelphia in the 1960s to commemorate jazz musician Charlie Parker. It soon evolved into "tagging", where people would write their names and gang numbers in public spaces. This spread to New York City, where graffiti artists began tagging subway cars. Police and authorities tried to crack down by cleaning graffiti, but artists continued tagging and moved underground. While some street art became more accepted as a form of expression, graffiti remained illegal and debated as a form of vandalism or art. The document outlines both positive and negative impacts of graffiti, including costs of cleanup, influencing others negatively or positively, criminal damage, making areas look intimidating, and causing personal hurt.