Graffiti

I really liked doing the graffiti for today's strip. I think that more places should have public graffiti walls, rather than mosaic tiled artwork that isn't nearly as cool or colorful as tag art. I'm also curious as to whether or not graffiti exists under copyright. I mean- it's vandalism, so- illegal, but there's also a general blanket copyright on images that exists once the work is finished and signed.
Miles says I was thinking too much about this...