If I understand correctly, gene drives maximise individual reproductive genetic success in a way which eventually makes a species unviable. I think the specific proposal for mosquitoes is to have a female-chromosome-specific gene which forces all offspring to be female and to carry that same gene.

This takes many generations to wipe out a species; only a genocidal maniac who believes The Other are literally another species would consider it; and the capacity to create it is also the capacity to reverse it.