So?
Those are the terms of sale.
Any grower that doesn’t like it is free NOT to buy Monsanto’s product, and EVERY farmer knows this going in.
Cross-pollination (e.g., wind currents) can introduce these genes into non-GMO crops whether the farmer likes it or not.
Did you hear about the guy that was sued because his non-Monsanto field got open polinated by his neighbor’s Monsanto field?