Granted, I'm not going to do any of my own research on this because it's an ethics question, not a current events topic. So I'm basing my answer entirely on information given before me.
righto it is majority ethics based and realitvely recent
Furthermore, if we allow farmers to use Monsato's crops without permission (again, even by accident) other agriculture research firms will see this and be discouraged. Whereas if Monsato is allowed to sue, investors will feel safer investing in research firms, thus promoting further research.
this is what I felt too, but the way monsanto executed it was just completely wrong in my opinion, had the followed the judicial system in place and not relied on their massive pool of lawyers this problem wouldn't have been raised. and people would possibly hate monsanto less