As long as the wind blows and insects pollinate there will be no way to stop one crop from being contaminated from another.
Wow! Really? Gosh!
That was the basis for my initial rant. If Monsanto wishes to keep control of their proprietary genetic strains, then they should keep THEIR crops hermetically sealed, not expect the small farmer to keep HIS natural crops sealed.
If you are a breeder of champion horses or dogs, or cattle or whatever, and don’t want to have your horses genetics shared in an unplanned way with the neighborhood nags, mutts and cows, then keep them fenced in.