Personally I think it's just as likely he's riffing on the ridiculous ways some behave having discovered a Banksy on the outside wall of some property in order

Personally I think it's just as likely he's riffing on the ridiculous ways some behave having discovered a Banksy on the outside wall of some property in order to sell. Whichever, or even if he is an evil capitalist villain, complete with white cat, laughing at our expense, I still like his messages and style.