Ideally we should also know what pesticides, fungicides and herbicides were used on our food, where it was made, whether any animals were harmed, the carbon, methane etc. emissions involved in their production, the wages of the farmhands and whether they have the right to unionise, the water usage in production etc.
Agreed strongly, and all of this strikes me as more important than whether the food is GMO or not.
Some are, some are not. The fact that some people (especially in the US) use silly arguments against GMO does not invalidate all concerns about the spread of modified genes etc.
This is a political consumer issue. You should be allowed to protest against food created in ways you disagree with.