I haven't waded in, but I think I shall.
To start.. I have no problems with people crossing dogs to create new breeds. If done ethically, and there are loving homes its no diff than breeding an old breed. There is no reason all the breeds we have today, are all the breeds we are ever allowed to have.
BUT when breeding a new breed...
1. Don't call it a puppymillesq type name. (ie goldendoodle) give it a new name (ie silken windhounds..if you don't know that one-google it)
2. Strive to have a consistent type. Stop selling F1 generations. The goal of anybreed is to produce a 'type' of dog. When you get to F20-F30 then we can start talking breed.
3. Don't breed any dog with less than stellar attributes that relate to health or temperment.
4. Have a good health guarantee-honour it.
5.Be responsible for the pups for their life, make sure they get fixed, and make sure they never end up in a shelter.
6. Prove your dogs in some way. Get some obedience titles, agility, rally-0, tracking, something. Prove the offspring.
7. If you are really into your new 'breed' start a club, so other breeders can help develop, prove, and support. Make all breeders sign a code of ethics. IF there is a club, join it.
8. Help with goldendoodle rescue. If there isn't one yet..start one. If you can place dogs needing homes, you won't need to breed as much.
9. With so many 'goldendoodles' in shelters make sure you have a long waiting list before you breed.
Just so you know I practice what I preach...
I breed a breed that is not considered a 'pure bred' but a type. I breed Jack Russells. I haven't had a litter in about 2 years, and am looking at breeding next year. My dogs are all titled in various sports. I will not breed anything that does not further my 'plan' for my breeding program. The last 2 girls I bought from a good breeder, one of them, their sire has one the most prestidgious conformation award a JRT can win. But I am fixing both of them. I love them, and will keep them. But they just aren't right for breeding. They will race, do obed, agility and goodness knows what else, but with so many JRTs looking for homes, I don't need to breed them.