"Marcus Williamson"
The only way to prevent the contamination is to
stop growing the crops in open fields and leave them in the lab where
they belong.

Have you still not visited the http://www.molecularfarming.com/safety.html
page yet, Marcus ?
There are many ways of not only stopping contamination happening, but
actually guaranteeing it.
We at MolecularFarming.com suggest a minimum 8km distance for pollen
producing crops.
Have you any instance where GM contamination was caused at greater than 3.5
?