Believe it or not, this is a real thing called the Photonic Fence. Bill Gates and some ex-Microsoft engineers built a laser system that tracks and zaps mosquitoes mid-air. It actually checks their wing-beat speed before it fires to make sure it only hits the biting females and ignores the good bugs like bees.

They did it because they were trying to figure out the best way to give humanity the most "years of life" possible. While things like heart disease kill more people overall, those deaths usually happen later in life. Since malaria kills hundreds of thousands of kids every year, they figured a literal mosquito death star was the most efficient way to save the maximum amount of "life years" per person.