The first GMO food in the American marketplace was 1994; hardly 35 years ago. It was a complete bust...no one liked the "flaver saver" tomato. Since then, everything has snuck in quietly, with no labeling, no way to know what is in your food.
I agree that they are using the American public as experimental animals in this case. 1994 to 2012 is a short time, not quite a generation. We probably won't know the effects of GMO foods for another thirty years. Science evolves, and many things get onto the marketplace that are later found to be unwholesome, dangerous or even lethal. Benzine, Thalidomide, BPA, organochloride pesticides, lead in paint, heroin, etc have all been used, thought to be healthy alternatives to what existed, and now are banned, or suspect.
I'm not ready to say that GMO is good or bad. I think the fact of the matter is there hasn't been enough research. I do know that pesticide and herbicide use is actually going up now due to GMO crops. The grace period is over, just as it is for antibiotics. Organisms develop resistance, and you are only left with those that can withstand the insult. I will continue to avoid most GMO food crops because I think the verdict is still out.
I still say that if it was completely wholesome, wonderful etc; growers would want their product labeled. Because they do not, it certainly begs the question of why.