I would hate to have to do it, but yes. The breeder I got Whitney from breeds "designer" mutts and I didn't have the heart to let her go when I found out, which was just a few weeks before I got her, after I put my deposit down and got attached. I wish I had had the fortitude to make a statement.
My breeder didn't advertise teacup and certainly didn't hike the prices that insanely high for her smaller pups either! And her mixed dogs weren't nearly that expensive. That's crazy. I paid less for my Whitney than she is charging for her malte-poos!