UPI: China rejects 60,000 tons of GM corn from the US.

[KurtNYC]

13. Glyphosate gets used on lots of crops, not just GMs

so the issues with glyphosate are independent of any other issues that GM crops may have. Almost all organic foods test positive for pesticides, they are usually at lower levels than conventionals but not always:

http://blogs.scientificamerican.com/science-sushi/2012/09/24/pesticides-food-fears/

The biggest experiment on GM foods is all of us eating them for the last 15 to 20 years. Millions of people eating trillions of calories from GMO foods. Shouldn't we be seeing something -- premature deaths, allergies, symptoms of poisoning, birth defects -- if these foods are unsafe for consumption?

To be clear, I am not 100% certain that EVERY permutation of GM crops are safe in every way (to grow, to eat, to use for bio fuels) but I am not seeing evidence of a major problem and many of the people who are the most scared have very little understanding of agriculture or genetics. Theirry points out the anti-biotic resistant genes (?) floating in China's rivers but that is a nebulous data point. Most of DNA in our bodies is not human -- it is bacterial. If you take a lot of anti-biotics then much of what is left in your body will likely show resistance to anti-biotics but that has nothing to do with GMO.