The part that concerns me about genetically modified food is that humans are playing with something we don’t quite know the extent of. Some of it is likely quite harmless, but who’s to say all of it is? Besides the obvious loss of genetic biodiversity, I think there are implications of that loss that people don’t think about too often, beyond the more common fear of mass extinctions.
I think that a responsible government would require all packaging to truthfully state whether it is genetically modified in labs so that consumers can make the personal choice of whether to financially support it or not. If people don’t care, then that’s okay; they could keep buying it. But those who do care would have a bit more direction.