If I am woefully ignorant, I welcome enlightenment, ecofarm.
1. Personal risks. These are largely overblown but exist in a lightning strike chance (ten lightning strikes in a row):
A. Horizontal gut transfer, particularly of antibacterial genes. Virus/bacteria take genes from other stuff. All GMO have antibacterial genes as a matter of process (petri dish selection). One can imagine the possible impact of such transfer.
B. Excessive pesticide use. While the idea is to use less as a result of ability to apply post emergence, in reality farmers just hose the field down whenever.
C. Lack of nutrition. Like all industrial crops, selection is for shelf life and uniformity. In this was, GMOs are not unique but the concern is highlighted. Evidence is generally only found in micronutrients and phytochems.
2. Social Risks.
A. Chemical treadmill. Google or wiki this. It's when a farmer becomes dependent on a company because his land becomes attuned to the inputs for production. His land becomes unsuitable for diversified or changing production while he becomes financially dependent (as well) on a corporation.
B. Disassociation from our food. Big subject in itself.
3. Ecologic Risks.
B. Non target organisms.
C. Genetic drift.
D. Excessive pesticide use.
E. Increased monoculture.
F. Who even the **** knows.
That's just off the top. I'm sure I missed stuff. You think there's nothing? Laughable ignorance.