Seed patent holders have previously, successfully, sued farmers who inadvertantly grew patented plants they did not intentionally plant, but arrived on their property through natural means.
The point here is, some farmers will be 'forced' to plant golden rice by circumstance, not intention. Are they liable for that, or not? In the US and Canada, historically, they have been.
https://www.centerforfoodsafety.org/files/seed-giants_final_04424.pdf
In most cases the outcomes have been settlements, most farmers simple can't afford to sustain the fight. I think there have been some that made it through the court system and ended up working against the farmers.
I haven't read this whole report, but I read the relevant section starting on page 29. It was sourced from this Guardian article: https://www.theguardian.com/environment/2013/feb/12/monsanto-sues-farmers-seed-patents