I've done it - I've never heard anybody put up a moral objection to it other than those who think it is morally wrong to ever lie or break a rule.
I remember reading an article about a year ago - I think it was Bookseller - where they had an opinion that it was probably some sort of fraud to give false information to a retailer in regards to your address. It'd be mind boggling to see a retailer suing a customer over it though.
"Amazon sues book buyers for falsely giving them money!!!!"
