302 - I think you are going over the top against back yard breeding. Actually I'd like to hear a definition of the term "Back Yard Breeding".
A while back I had a few dogs. They ran around in my "Back Yard" often. I bred them a few times. Sold the pups with papers and sometimes in the same litter without papers. They all paid visits to the vet before 8 weeks. They were healthy, normal social dogs.
Am I a Backyard Breeder?
My brother recently bought an English Bull Terrier from a couple who raised the parents in her home. The pup came with papers.
Is that person who sold my brother a wonderfull, healthy pup - a dreaded "Back Yard Breeder?"
One of the pups I bred came with a short tail. A non-standard tail. I did NOT cull (as you suggest) that pup for betterment of the breed. Simply sold the pup cheaper without papers to a loving home.
Food for thought - I suspect ALL top notch professional breeders started at some time as a terrible "Back Yard Breeder.