I have mixed feelings on this - mostly, if we do such a thing, we'll need to replace it with something. I think corn farmers really wouldn't have an issue planting sugar beets instead, so long as the various corn sugars (Including but not limited to HFCS) aren't a byproduct of another process. Without some sort of safety net for farmers, it could really hurt some folks, mostly because I'm assuming different harvesting attachments are used for the two crops and what side industries might be hurt (whatever we use corn cobs for, for example). But I simply don't know the answer to this.