This has been commented on before here and elsewhere: the elimination of certain species of mosquitoes that seem to serve no ecological purpose other than spreading disease.
There may be political motivations/economic (Malarial drugs would plummet for example), but I think it goes further than just that.
We don't think there are any ecological purposes .. but spreading disease is a purpose. Animals that have been kept in check may explode. Human populations are already exploding.
Parts of this planet are in bad shape simply due to species introduction (Australian Camels is a good example). Other species have been introduced to solve the initial problem, only to create more problems.
I would like to see an end to these annoying insects too, but there could be unintended consequences. Those are legitimate concerns.
There have only been a handful of small-scale field studies conducted so far; whether it will "work" regionally and long-term is another matter. So while the idea looks promising, objectively speaking, it's still a work in progress.
