An interesting site Mike...thank you.
One of my interests is vegetable gardening and I try to stay as organic as possible. It was interesting to note that chemicals used in pest control don't seem to be selective and in organic growing great use is made of the beneficial insects such as ladybirds, lacewings etc....so we want to keep them. Nematodes are becoming widely used in pest control in organic gardening and the chemicals described will eliminate these too.
A great discussion has arisen lately on the various aspects of 'saving the planet' to which I would wholely subscribe. The use of chemicals (any chemicals) usually means that at some point they are going to enter the eco system.
Any chemical that is going to destroy bacteria, pests etc, if not selective, is going to upset the balance of the eco system at some point and as yet I am not totally convinced as to the overall benefits to society in the long term.
Many sections of the environment rely on bacteria to function effectively...my compost bins are one example.
Another point I will throw into the debate: By effectively chemically eliminating all these bugs and beasties our bodies won't need the natural in-built bodily function to build up resistance.