Some may consider it an eyesore, but urban graffiti is wall art to many, and a practice that visually represents the desire for presence and recognition. It is a phenomenon linked to the hip-hop ethos, and Kevin Element's article, "Hard Hitting Modern Perspective on Hip Hop Graffiti" explains the issues at stake thoroughly but succinctly.

Put me back on track.

Re-blast me.

Beam me up.