A recent article by Josie Garthwaite (A New Generation of GMOs. Is synthetic biology on its way to our farms, markets and tables? http://ensia.com/features/a-new-generation-of-gmos/) quotes:
'For groups like Friends of the Earth, part of the concern is that synthesized DNA is developed “outside of nature, outside of the process of natural selection.”'
If the above view holds, then it also holds that the human species is alien to the Earth system. The flaw in this view is that people are not part of natural selection processes operating in nature.
People are not an invasive species on Earth.