I don't have the knee-jerk response that so many other Cassandras have exhibited towrds gmfs. It would depend upon the specifics of a particular item.
There are a lot of scares about this or that being perpetuated. They all seem to be based upon a basic and innate distrust of anything that might possibly, no matter how small the likelihood, affect human beings adversely.
Look at the now current fear being spread about invasive species. You would think that up to now, there's been no previous history of a plant or animal that had somehow left its native place of origin and ended up somewhere else where it proceeded to wreak catastrophic havoc.
But then consider tomatoes. Their origin was in the continent of South America; they were brought to Europe 500 years ago and subsequently defined the cuisines of Italy and France, as well as Asia, for the better in my humble opinion.
There were no apples at all grown in this part of the globe until a half-millennium ago. Would you consider them an "invasive species"?
Human beings may not be invulnerable but neither are we made of fragile glass.
I'm not saying we throw all caution to the wind but just because a food has been genetically modified does not mean it will cause irreparable damage to our, or the environment's, well-being.
We have to learn to act a bit more intelligently towards our consumption of any and all food stuffs, and not just react automatically with fists flying to some simplistic, button-pushing propaganda.