What we do not know, because no one has looked very hard, is what affect this gene has on human beings. There is some evidence, pooh poohed by the industry out of hand with no real research by them, that there may be some adverse affects on us.
Some doofus proponent of genetic engineering has said that these Bt genes do not get into the food part of the plants.

kimmsr , your first comment is applicable to an array of "products".
I start off by stating that there is a carcinogenic product in the water I drink; but it goes undetected because either there is no test for it or, it is there in such minute amounts that instruments in common use cannot yet detect its presence.
And there seems to be no scientist who has a 'gut feeling' and / or the intestinal fortitude and / or the moral conviction to take a stand.
Ever so rarely there is a Dr. Frances Kelsey on whom I have affectionately conferred the title "Mother of the American Nation".