Every fruit and vegetable should come with a complete description of its journey from birth to the supermarket, compiled and written by a professional biographer. Doesn't the consumer deserve to know?
Although it is of course ridiculous to go that far, I don't think much harm can come from increased transparency over food.
I hear that claim frequently from proponents of GMO labeling, almost always stated as if it were self-evident. I don't understand why it should be taken as obvious, and, even if it were, it would not be a particularly compelling rationale.
There is an argument to be made that labelling GM-crops
demystifies the GM industry. Largely, the entire anti-GM movement (apart from "natural food" hucksters) is directly the fault of the stupidity and cravenness of the GM industry. People view GM crops in the abstract or through a fearful lens - sweetcorn with human ears or whatever - they do not make the connection with what is on their plate.
Basically the food industry is wasting money lobbying against "GM labeling". If more states pass the bills, and people realise that GM foods are in their everyday staples, the debate will take a much more reasonable tone than contemporary discourse. ("OMG u r so dumb and anti science lol!" "well ZOMG u must be shill for Monsanto!!!!!")