As much as I enjoy finding street art gems while strolling along the streets, I cannot stand tags and graffiti on unwanted surfaces. Here's one that I saw on my street the other day. Curses to the derelict that did that. However, here's an act of 'vandalism' that I definitely approve of. Moscow-based Russian illustrator Nikita Golubev sees a canvas where others just see dirt. He uses . . .