I just uploaded a large collection of photos that I took while walking around Berlin. Mostly photos of various stencils and traditional spray paint graffiti. The pictures range from disturbing vandalism to amazing artwork, with everything in between. It is hard for me to make a real value judgment because I'm both repulsed by vandalism and interested in the sub-culture involved in making this stuff. In some ways I can see a comparison to ancient rock paintings and the need to say "here I am". I also find most commercial advertisements equal or worse to this "peoples art-form" and a sign for Burger King is not much more than corporate "tagging" in my eyes.