Morphs are not being reintroduced into the wild population to interbreed so I am not sure the issue. I agree with the analogy of dogs. If we condemn the genetic manipulation of snakes like ball pythons then we have to do the same to dogs, cats, chickens, rodents, fish, and even plants. I personally think substandard breeding and careless trait manipulation is far more to blame than genetic manipulation as a whole.

I know also where this ends up, the spider gene. This gene has been proven out to be a non detrimental neurological condition if one can even call it that. Yet, it gets more of a stigma placed on it than the obvious genetic defects like breeding an all white snake which in the wild would be a death sentence.

Cull the morphs that will never survive, it is the ethical thing to do but do not label genetics unethical simply because it produces a product outside the scope of evolution.

In reality you are going to be hard pressed to find articles discussing the ethics of any breeding of animals because it is all a profit driven enterprise and it seems we as people crave the odd and peculiar and will pay handsomely to get it.