That is evil.
I'm trying to remember the name of the seed harvester interviewed and for the life of me can't. The Food, Inc. website and a few searches haven't helped either.
You know what would help African farmers? Education about irrigation and scientific, low-moisture farming techniques. Provide non-hybrid seed and equipment than be used by locals to clean and store it.
The solution is never so simple. I could just as easily and correctly (ignoring all human implications) say "You know what would help African farmers? Move them somewhere more conducive to human life." Sounds awesome in theory, but consider the implementation details and effects on life of both options. You always have to make a trade off in practice between what is an "ideal" solution scientifically and what can actually be implemented given the real humans involved.
This is not accurate as a blanket statement. Not all genetically engineered seeds are sterile, only a limited subset (Monsanto only acquired the sterile technology in 2007 and I don't think they use it in all seeds)
The heroin analogy is idiotic. Nothing is stopping the farmers from switching back to conventional crops if they don't find GMO's more profitable then what they were doing before
This problem has already occurred in most western vegetable growing.[1] Locally adapted varieties and varieties with certain commercially undesirable characteristics are lost forever, this has a massive negative impact on biodiversity, and thus food supply security.[2]