WOW... while checking out some of my favourite blogs...
The "Brothers Brick" posted this... http://dunechaser.blogspot.com/2006/07/street-art-appreciation-101.html
and all I can say is WOW!
While they state they don't endorse vandalism, and I will agree with that in theory, (just as another posted added) those bits of graffiti fall into a category of street art that I am glad exists.
Colour me impressed and hide the spray paint, 'cause I am feeling the uncontrollable urge to go paint the town red........ brick.