Can Graffiti be a good thing?

I dont care what you say graffiti is an amazing artform. though it is illegal to go out and tag a building it definitely take serious skills to make a legit graffiti tag. like the street artist Banksy see picture above. He is probably one of the most famous graffiti artists out there. He has a website that sells merchandise of the art he has created. So he is now making money off of his art. but if you wanna read some more positive feedback you can always check out this link.