Banksy is like the Malcolm Gladwell of art. He's really good but crossing over into the world of pop culture has garnered an unwarranted amount of scorn. I like Banksy and I like Malcolm Gladwell, both are really good at what they do.
I liken Gladwell to other mercenary concern trolls like David Brooks.
But in my rush to defend Banksy... I realize I have no idea who signs his checks. His schtick could also be just another troll. Bread and circus to keep the hoi polloi complacent.
Indeed, how could Banksy not be? Either by default or by design, result is the same.