Opinions on Banksy's art and graffiti as general? I think most of Banksy's stuff is beautiful, a lot better and with a lot better meaning than most 'modern art'. What just makes him all the more brilliant is that no one knows who he is, its great! In my opinion he's one of the greatist artists of our time, if not the greatest. Obviously, he's not on the same level as people like Da Vinci, but still, a brilliant artist.
Also, on the subject of Graffiti, I think it should be legal in some area's and there should be assigned Graffiti Areas. Because the more you outlaw it, the more people are going to want to do it anyway. Obviously there are exceptions, for instance when someone writes 'G0 W@NK YA M0M' on an old peoples home, then possibly it should be illegal. But as long as it doenst have any racist/discriminate/rude messages or word's, it should be fine.

I LOVE Banksy's art. I totally do.
And graffiti, should be legalized. Not those stupid kids writting Im Da BeSt on walls, the art.

Ahah it's never something I've given a thought to, that actually. See, the term "Graffiti" and the term "Graffiti art" mean two entirely different things to me, or at least they did when I was still at school with my art class. So it's not really a blurred margin. But I do give you that it's a grossly underrated area of expressionism.

Culturally speaking though, Banksy was always cast in a bad light by those who opposed the ideals he portrayed in his work. A good example would be the defacing of the Israeli wall; designed to keep the citizens inside the area. They expected Banksy would work upon the wall and so guarded it, but still he managed to graffiti the wall with images depicting the citizens' wishes to escape and how ridiculous the idea was.

For the most part thankfully however, Banksy gains immense respect in the art world.