About the pieces outside the Carlton, Banksy talks about them in the Interview in HipHop Connection:
"What was it like painting in New York?
“I’ve lived in New York on and off for about two years, and last year I was asked to do a series of paintings. I did a picture of a guy sitting on a subway train, then Mickey and Minnie Mouse get on and start mugging the guy and painting graffiti all over the train. It was a comic strip and was put onto the side of the Carlton Arms Hotel as four pieces. Some people got really s**tty about it, especially they found out I was English. These two women who happened to be the wives of lawyers started a campaign to have it taken down. The New York Post ran a story on it but thankfully it stayed.”