Hi Marcus
You could always follow the recommendations I make in the
http://www.molecularfarming.com/safety.html section of
MolecularFarming.com.
DNA marking with GFP or firefly luciferase, Terminator gene technology,
Chloroplast engineering - or simply use Tobacco, Hemp and non-food plants.
A 'blanket ban' would rob the world of an edible vaccine which could
possibly save 20 million African children a year.

"Marcus Williamson" wrote in message
...

But there need to be much better plans to keep this kind of thing from
being
able to happen.

The only possible solution which will work is to forbid the growing of
pharmaceutical plants completely. Any other approach is guaranteed to
lead to contamination of the food supply, as with StarLink and
Prodigene...

regards
Marcus