The parent topic asks, Monsanto made the roundup-ready soybeans, which took millions to develop. If the farmer doesn't want to be sued, he could use non-roundup-ready soybeans.
In the documentary, they profile a farmer who got sued by Monsanto for not paying their license. The farmer claimed he was not using Monsanto seeds. However, Monsanto's argument amounted to "We are the largest seller of these seeds in the world, therefor, it must be our seed. Even though you can prove it isn't, you must have "washed" the seed to make it seem like it isn't ours, or maybe some of your neighbor's Monsanto seed blew into your land and you owe us for that too."
The judge sided with Monsanto.
Yes, this shows our legal system is evil for letting them get away with this, but the fact that Monsanto is driving around & actively looking for farmers who aren't using their seed, extorting them for not & dragging them into a court battle they know will bankrupt them is evil too.
For further viewing, check the Monsanto Food Inc. clips. They are on YouTube. Mansanto has also responded on their website.