Oh, it will keep working in countries where evolution is just a theory.
This will only work if the people who don't believe in evolution choose, therefore, not to swat the glowing mosquitos. Otherwise, the genes for glowing will quickly be bred out of the population. I know a number of people who say that they believe in microevolution (survival of the fittest within a species), but who deny that a series of small changes can add up to macroevolution (a new species).
Do not simplify the design of a program if a way can be found to make it complex and wonderful.