That's exactly the problem: we don't have real freedom of choice. Genetically modified organisms are not easy to detect - and their spread is not easy to control. Life finds a way, and if it goes across the neighbor's field or through the stomach of the pig that ends up as a steak on the plate. And all of this just to boost the profits of individual biotech companies. There's no real economic reason for this nonsense in Europe, there are no extreme environmental conditions that make growing normal plants impossible. On the contrary, there are overproductions. Genetically engineered plants designed to be resistant don't make sense in Europe. But the biotech corporations have to rip off consumers once again.
At Spiegel Online: Wissenschaft there's the original article.