http://en.wikipedia.org/wiki/Genetic_use_restriction_technol...
One of their big cash cows in poor countries where they have a lot of influence is using their seeds to basically steal land. The seeds from one field that paid for them will blow into another and grow there next season. A Monsanto lawyer will then serve papers to the farmer next door who, through no fault of his own, has some Monsanto plants growing within his normal crop. Of course they sue him for some ridiculous amount he can't possibly pay and he ends up losing his land. Profitable business model.
but being anti-GM is being pro-starvation. The green revolution increased agricultural output dramatically last century, and we need it to continue if we're going to feed everyone. Its first-world boutique convenience versus third world life and death.
Hopefully the population will start to decline due to lower birth rates... I hope at least. :)
Not that I'm advocating this. I think people should be responsible enough to choose how much to reproduce.
Thats only an option if you have enough money not to have to have enough children to support you in your old age. In much of the world, large families ensure the well-being of parents into old-age. You should be so lucky as to marry, have a ton of kids, mostly males, have them all live. Social security bling bling! This is why poverty and high rates of reproduction go together.
That existing set has been "vetted" by thousands of years of the plant living, and people eating it.
You have no such knowledge with genetic engineering. You can only do a study and hope that any bad effects are not so subtle that you have a hard time finding them (i.e. subtle things can take decades before they are discovered).