In a case like this, I think there is far more that needs to be considered... like, 3 generations down the line. Say someone breeds a het for scaleless to a non-het, making poss het babies. This breeder sells them as poss het, and honestly represents them. Another person buys a pair, one with the het and one without. They breed the snakes, producing no scaleless snakes, so they assume the parents don't have the het - problem is, one does. Which means half the babies do. These babies get sold, produce other babies, half of which have this mutation, and eventually, someone like me breeds them together, hoping for some very cool PLANNED morphs, only to find that this abomination has been propagated and is now in my own collection. I would cull every one of the babies, and permanently retire the adults. How fair is that?
I think there is a lot more to consider than just "if you don't like, don't buy." I'm with Tula on this one... next it will be eyeless corns, then tailless corns, and who knows what else. The ability of the animal to survive under captive conditions does not, IMHO, mean that it is not suffering.