I've seen some graffiti I've really admired, but for every decent piece there are at least twenty which are just crap. "Every graffiti artist is a superhero." and "all graffiti is art" are questionable statements (the latter depends on how you define art).

Most of the graffiti I see around is some garbage about football (soccer) clubs or someone's tag/signature. That stuff isn't usually entertaining or very artistic. It's usually monochrome.

There is a very basic reason that graffiti tends to be in the city. It is where most people live and people don't usually go out into the countryside with hundreds of spray cans.