That's why one of my favorite breeds is the Border Collie. They are usually bred for working ability, not for the exaggerated standards of the breed. Although some are bred for the standard, they are a small minority.
I see this a lot in my country. I try to turn a blind eye to it... because I can't really cope with reading "Male red nose pitbull looking for red nose girlfriend call xxx-xxx-xxxx". Clearly NOT responsible breeders!
Dog shows should change their rules to include a genetic testing, veterinary testing, etc. But I highly doubt that this is going to happen.
I sincerely do not think that there is anything that can be realistically done to change the fate of the purebred dogs. Breeds will continue to be ruined, until all the viable purebreds left are those from good breeders. I'm really pessimistic on this issue :/. It leaves me heartbroken.
No matter how many campaigns we raise against bad breeders, stupid people are always bound to NOT CARE about it! You can't really blame somebody who trusted a breeder because they didn't know any better. But the people who know about it and still support BYBs... they drive me NUTS.