http://www.damemagazine.com/2013/04/03/monsanto-six-truths-a...
But the Monsanto stuff is a highly technical issue, and neither Michael Pollan nor Eric Schlosser appear to have much expertise in them. There is a lot of GMO FUD. I would not assume that none of it leaked into the movie.
(ASU because it's across the street from my house)
http://www.script-o-rama.com/movie_scripts/f/food-inc-script...
Several people in the farm industry are interviewed. Their statements are not questioned or further investigated by the filmmakers.
Well then finally we can all agree that Monsanto is detrimental to the development of GMOs. No one is claiming that Monsanto is "waiting for the wind to blow IP-encumbered seeds onto fields", so that might explain why you can't find any evidence of it.
What people do have a problem with, is a patent troll and a litigious one at that. That's what Monsanto is and there are plenty of cases to prove it:
http://www.nature.com/news/monsanto-may-lose-gm-soya-royalti...
http://en.wikipedia.org/wiki/Percy_Schmeiser#Schmeiser_v._Mo...
(Others have pointed out that no, Monsanto does not control the whole industry. But they are by far the dominant player.)
Overuse of Antibiotics, Pesticides, Herbicides and Fungicides are the stuff that create our allergies and poison bees too. Birds eat those poisoned bees, I really don't know how far this goes down the rabbit hole, but I'm worried.
The reality is that Monsanto sues farmers when they take Roundup-Ready crops, plant them, and then use Roundup on those crops. You can't do that innocently; if you spray Roundup on non-Monsanto crops, you kill the crop.
If there's a case where Monsanto sued a farmer simply for having Roundup-Ready seeds or plants on their farms, I haven't seen it, and I've (a) looked and (b) asked around a lot.
If you just mean that patent enforcement is inherently scummy and antagonistic, well, I have no snappy response for that. Although again note that the problem with software patents is that you can implement some obvious piece of functionality and get sued by someone with a ridiculous patent. Like I said, nobody accidentally uses the whole Roundup system on a farm.