Yes its an interesting way of expression but we have a small percentage of good Graffiti work and a great percentage of pure vandalism, In this shot i just like the red head!
But i agree that a good graffiti can emphasize the visual perception of some spaces, valuing the space!
Originated in Italy, graffiti have spread wide across the globe and some of the messages are really
pure vandalism indeed as in this example where it was not done on the wall but on the surface of
some government property.