If a customer wants to know if food contains a particular ingredient...
Yes, he should know. But then, you're not talking about disclosure of an ingredient. You're talking about disclosure of the use of various processes you don't like, without having substantiated the materiality of risks of those processes.
My main concern is [...runaway...] GMOs and turning millions of people into unwitting lab rats.
Those would be unsubstantiated fears. And though your fear is undoubtedly "real", that which you fear is invented.
The courts, quite rightly, have little use for unsubstantiated claims. It is not Mansanto's money that compels the actions of the courts; it is the substance of Monsanto's arguments.
Imagine as you will. The courts will not be easy prey for your fears.