A French court has ordered Greenpeace France to remove this Google Maps mashup showing where Monsanto is genetic engineering maize. In retaliation Greenpeace members responded by going into those fields and carving a giant ‘X’ crop circle into the maize. According to this Greenpeace story:
The EU law says that member states are obliged to maintain public registers in order to inform their citizens about the locations of GE fields. But the French Government is dragging its heels in making the EU’s directive into national law, depriving its citizens of vital information to protect against the risk of GE contamination of conventional and organic food.
If you are German, you can find out the locations of GE crops easily by looking on government websites, if you are French however, you are kept in the dark.