On his way to a rural house in the middle of Tanzania Myhrvold would suddenly panic. He would discover that as he moves into the countryside that there is no electricity. Bummer.Next, he would have to set up at least three curtains (in a triangular fashion) around a local house, needing three lenses, lasers, and of course sophisticated computer soft- and hardware. He would need an uninterrupted power supply (UPS) to make sure the surges in voltage would not damage the equipment. All of this would add up to a cost that one could build a pretty fancy new house for, fully screened, fitted with bednets. Imagine a village of fifty houses and the equipment that would be needed there to blast mosquitoes...And then, what would happen if someone passes a 'curtain' and his eye is in line with a mosquito being zapped at that very moment? Not nice, I guess.My initial plan was not to write about Myhrvold's invention, fuelling attention. But I kept being bomarded with email asking me about this great new idea, and this morning I gave a radio interview on the matter for the world service.Martin Enserink, journalist at Science magazine, agreed with me that it is unethical to market such an invention by telling the press that every 43 seconds a child dies of malaria.I stand to be proven wrong, but Intellectual Ventures' invention will probably face the same fate as the US Star Wars programme of the 1980s. It will end up in a drawer, never to be heard of again.Still a believer? Then watch this <a href="http://www.youtube.com/watch?v=wSIWpFPkYrk">video</a>...&nbsp;