How many frogs in the hobby, pure or not would fit the criteria for introduction? Very few if any. How many frog species have been "lost" due to captive hybridization? None that I am aware of. Your objections tend to be more based on emotion than fact. That is fine, but just because your emotional about the issue it doesn't follow that everyone who doesn't see it exactly as you do is wrong. It is a hobby for enjoyment after all, different people enjoy different things. Further, some 'frankenfrogs" as you call them, occur naturally in the wild in many places, it isn't the end of the world. Wild hybrids are well documented in numerous north american toad species with overlapping ranges, and natural hybrids also occur in some toads of the melanophryniscus group whose ranges overlap and doubtless in many other species as well. If we had the ability to better document frogs in the wild I think you might be surprised how many species hybridize in the wild upon occasion when the conditions are right.