Voted for For.
I guess I consider street art and graffiti two different things. Maybe I should distinguish it even more and say i don't like tagging, where someone just sprays their name or their gang affiliation on whatever they can find just to mark their territory or for the thrill of getting away with it.
However, there's a lot of street art that I've seen, commissioned and sanctioned, that is quite beautiful. The artist gets recognized for their efforts and often gets paid. I think that's very different than lurking around at night spraying whatever railroad car or dilapidated building one can find.