The issue with this for me, is that there are also many taggers that do consider themselves artists (see above photograph). So how do we categorize all of this? Art is subjective, of course, and there is never a right or wrong answer to whether something can be considered art or not, but how to categorize a subculture with so many different intentions?! You hear it all the time "Art or Vandalism?" Well, call me crazy, but what about considering the fact that it is BOTH. While the tag in photograph at the top seems amateur and mindless (to me at least) it does not mean that someone did not put thought into it and considers it a piece of art work.
Also, what about taggers who do not intend to create art, but only to vandalize for the thrill and the territorial aspect of it. What if I see a tag, and it is made by someone like this (without artistic intention) but I think it's amazing and inspiring. Is this now art? was it always? My head is spinning. How about you? I guess it can be said that just because someone does not set out with the intention of creating art doesn't mean that their end product cannot be considered art to someone else.