Banksy and the tradition of destroying art

When the British street artist Banksy shredded his “Girl With Balloon” after it was purchased for US$1.4 million at Sotheby’s, did he know how the art world would react?

Did he anticipate that the critics would claim that the work, in its partially shredded state, would climb in value to at least $2 million? That the purchaser would not object and would instead rejoice?