Call it BRM: Biological Rights (read: Restrictions) Management.
Edit: after some googling, I need to read the stories suggested by tartuffe78. They look really good.
tartuffe78's comment: https://news.ycombinator.com/item?id=10081875
Fields for seed are far removed from productive fields. It's trivial to keep them separate from contamination; in fact, it's essential that this is done to make selfs or directed crosses.
Terminator was made to address concerns about transgenes entering the wild. Think of it like a mule; you still have offspring, but they're infertile. That's what terminator does. It cannot ruin a crop. Seed is still made and can be sold and eaten. It simply is infertile.
A construct was first developed by the ARS and USDA, and they were quite right to pursue this. It's a useful technology.
Terminator constructs exist, and yes, in corn too. They have useful applications, such as the restriction of transgenes from entering wild populations.
Think of terminator progeny like mules; they're simply infertile.
I have news for you: All apples of a certain variety (eg. all Granny Smith apples) originate from a single tree. They all originate from the same individual, same clone. Pieces of this tree have been grafted onto other trees and so on, and that is how all the Granny Smith (or any variety) in the world are produced.
To produce Granny Smith, you need a twig from a Granny Smith branch, and to graft that to another tree.
The is a fascinating read: http://www.motherjones.com/environment/2013/04/heritage-appl...