Hirst's work seems pretty shallow, as if that's his provocative shtick, which runs the risk of only being shallow, and not provocative.
Banksy's work has a poetry to it, which makes it much more interesting. However, he does have a shtick, and I think stunts like this one risk going over the line, as there isn't anything actually poetic about it. It's more like a MTV punk'd episode than something thoughtful.
Personally, I'm tired of art that has to score high on the provocative axis to be successful.