I can see where you are coming from but I have to disagree. Color and pattern variations are naturally occuring. We have taken it to the extreme with designer morphs but all of those morphs were created by combining naturally occuring genetic mutations. Whether or not those mutations would have lent themselves to survival in the wild is a whole other issue.
Burms and balls, on the other hand, are not going to hybridize in the wild as they are on separate continents. Whether or not they have ever shared habitat in their history, to me, is irrelevant. In recent history, there is no way for a natural ball/burm hybrid to occur.
Having said all that, my biggest issue with hybrids is the potential for me to end up with an animal that is not what I intended to work with. I chose, for a variety of reasons, to work with ball pythons, not burms. Now in the case of these pics, the fact that the animal is not pure ball python is obvious to someone who is knowledgeable about burms and balls. However, what about someone new to snakes? Or how about several more generations when the appearance is not so different one way or the other? The possibility could exist for me to get a "ball" python that had burm blood in it and that is not what I want.
I recognize that, as a buyer, I have some of the responsibility for doing my due diligence in determining that I am getting the animal I want. However, there are those that would pass off a hybrid as one species or the other just to make a sale.
I'm not going to stand here and try to tell someone that they can't make hybrids if that is their thing. I just think it is a risky proposition in terms of potentially poluting the gene pool and much different from taking two naturally occuring variations and making a Snow Ball, for example.
Just my thoughts. These and $1.00 will get you the paper.
Rob