This is a well-written essay on Bt by Sour Salty Bitter Sweet – critical thinking in action here:
…The only thing that’s new and different about Bt sweet corn is that it’s designed for immediate human consumption rather than cattle feed or high fructose corn syrup. Since there’s no reason to believe that Bt is bad for you, before or after it passes through a cow’s gut or refining plant, there’s no reason to believe that Bt sweet corn is some kind of strange, new, scary thing. Unless you happen to be an organic farmer who grows sweet corn, in which case you may be relying on the far-less-efficient process of applying Bt insecticides externally via spraying, which must be repeated at least half a dozen times throughout the growing season. Then, I imagine you might indeed feel threatened by farmers who can grow plants that produce the very same proteins themselves.
The proprietor is not a geneticist, not a farmer, but she has done her homework. And no, she isn’t a shill for Monsanto.