My thoughts are that it would be abused. Keep in mind that a person chooses the book they buy and the books are not forced on them. I have read some shockers but they were my choice to buy in the first place and I just wont buy from that author again. As a published author myself, I feel that it is the Authors responsibility to produce a good product, not the publishers fault if people dont like it. People have different tastes so I think it would be a huge financial disaster for both publisher and Author alike and would not like my publisher to do that type of scheme with my work. Just my opinion.