>>Sorry, but you really seem to be speaking gibberish. According to your logic, invasions of lionfish wiping out coral reef fish are "balanced" because the lionfish weren't there before...
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Hmmmm, seems to me you are not following the simple logic. Your lionfish analogy is flawed. The pythons are not wiping out other snakes, they are TAKING THE PLACE of animals that WE HUMANS wiped out. The indigo snake example that Upscale used is excellent. Or are you going to claim, without evidence, that humans wiping out species like indigo snakes and other top predators don't have any effect on the ecosystem???