Also Government oversight is really crappy, that means that these companies can do whatever they want with these animals/plants and have nothing done for the way they do it. An example of this would be The FDA doesn't require a single safety study to be done, doesn't require GMO labeling, and allows companies to put their food on the market without having to notify the agency.
Another good reason that we should stop GMOing foods in because numerous health problem increased after GMOs were introduced in 1996. Also GM seeds and plant can cross pollinate making new hybrids and this causes us to lose the original way the plant was.
GMO's should be banned because studies have shown that animals who have been GMOed have organ damage, gastrointestinal and immune system disorders, accelerated aging and infertility. Studies done on humans show that GM foods leave materials behind inside of us and possibly cause long-term problems.