Yes please. Cut out the fighting and just have a good time. Really, graffiti has MANY definitions. It a stylistic type of text (not always on wall, could be on paper, the ground, etc.), it's a kind of vandilism, it could be pictures, and it's also considered a type of artifact.
So, com'on, let's all be good sports.
My vote is for Emy [6]. I love the creativity here. It's so simple, yet so lovely. A wonderul combination of unusual text and striking art. And it's one of the few with out a wall in the background. I like that difference, it just says to me "Hey! I'm graffiti! Who said I had to be on a wall?" Well done Emy.