the genie in the bottle

I heard this week that there are plans to use genetically modified mosquitos to fight malaria. These new insects are unable to carry the malaria parasite and therefore will compete with the malaria carrying mosquitos ,the plan being that through this competition the baddies will be ousted by the goodies. However this last phrase indicates why there should be a cause for concern over this. The scheme seems too simplistic and full of dangers. Think back over the last 50 years to where species have been introduced artificially outside their natural habitat and it is possible to see a record of unparalleled disasters. The problem with a genetically modfied specied is that it is unnatural, and being unnatural we do not know what to expect. Always in the past there have been overwhelming reasons why a certain action should be taken and assurances given but once something has gone wrong it's too late. A scientist can resign or be fired but the genie won't go back into the bottle.