Damn those liberals and non-Americans...
Seriously though, as I understand it, the main concern regarding GM crops is the kind of 'arms race' that has begun in the Medicinal sector because of a vast over-use of antibiotics to treat infections, not it's direct impact on a human. The more we modify crops to deal with strains of disease, the more resistant those strains of disease become. As has been mentioned before, we've been doing this for centuries, anyone who has eaten a Banana has experienced genetically modified food, only the modifications took place over several generations.
As far as copyrighting genetics is concerned, we've also been doing that for a very long time, particular strains of cattle, particular fruits etc, Apples, in particular, is an industry that relies extremely heavily on 'un-natural' methods to produce its stock in the specific varieties we know.