Art or Vandalism?

Living in southern California obviously has its benefits, I can go to the beach, the mountains, and play golf in the desert in the same day for instance. I live about 45 miles south of Los Angeles, one of the biggest cities in the United States as far as population and business are concerned, and while Hollywood and all the sky scrapers show the glitz and glam of L.A. there is also the extremely dangerous and not so wealthy parts of town. One of my favorite things about the drive to L.A. isn't seeing the massive buildings in the distance, but all the awesome graffiti tagged along the freeways and neighboring buildings. While some is obviously gang related, the other spots are literally pieces of art. Honestly if you were to see some of the things people are able to do with a can of spray paint, the images they are able create, the way the words almost come out at you in crazy fonts. So is it vandalism or art? Another form of vandalism I find highly entertaining is the things people carve into the desks and stalls around campus. Fraternity letters that may have been there from the 80's or 90's silly messages that entertain me while I am too distracted to continue reading. Unless the message are speaking ill of someone's name I see no harm in it, it's not like the desks in the library are even close to new anyways. While i would never carve something into someone else's property I do enjoy the aftermath of other people doing it.