This (2) case is, I think, mostly (maybe entirely) false. In every case I've read where this was claimed, the actual fact pattern was that the "victim" farmer wound up with unlicensed herbicide/pesticide-resistant crops that they then sprayed with herbicide or pesticide. If you plant unlicensed Roundup-Ready seeds and then spray the crop with Roundup, you know what you were doing.
That's a thing that can happen, but there's no evidence that anybody has been sued for it. The cases where people have been sued, the record is pretty extensive that they knowingly used the whole system, not just the seeds.