I dont have an issue with hybrids so long as they are documented. I like to know what the snake actually is. In the case of locality subspecies with carpets or boas, there is such a range of sizes and colors just naturally, that they start to get mixed and muddled, and you can't tell if your snake is going to get 4 feet, or 12 feet.

I know that with most other species (e.g. some birds, mammals such as mules), the offspring are infertile if the species is seperate enough.... is this the case with bloods and balls? or carpets and balls? I see no harm in breeding for these hybrids, if the offspring can't reproduce.