[Stefan-A]

Well, it's a concern for many, especially serious breeders. Most want to come as close to the naturally occurring form as possible.

I myself have mixed feelings about the whole thing. Hybrids in general don't really bother me, as long as the owner is aware of them being hybrids and is able to keep them from threatening wild populations or messing up work done by serious breeders (buyers always need to be informed). On the other hand, a local (amateur?) breeder mixing two subspecies of Nerodia fasciata kept me from buying a pair. I admit I'm a hypocrite, since I just mated a parietalis with something that may or may not be another parietalis.