I don't know that there is much difference between people who carelessly breed purebreds ("hey, I've got a lab, you've got a lab, let's breed them and make money selling the puppies") and those who breed these designer breeds. In both cases, producing healthy dogs, if that is a goal at all, is secondary to making money. As someone mentioned, a truly good breeder will take a dog back at any time in its life. The ads you see in the newspaper for purebred dogs are not, for the most part, placed by these truly good breeders. They're placed by people who bought, say, a lab, from some guy who happened to have bred it to some other lab and had puppies. Those people would laugh at you if you called back seven years later and asked them to take back a dog you had bought from them. In my humble opinion, the only people qualified to breed dogs are those that are doing so with a goal for producing physically and behaviorally balanced offspring for some distinct purpose, and are willing to stand by the dogs for life. There is no difference between people breeding neurotic or physically defective purebreds and those cross-breeding and calling them "designer dogs". As far as paying more for registration and papers, who cares, unless you're planning on showing or breeding.