>First thing they should do is to cover propellers so that they don't hurt anyone. Does anyone know why this isn't standard? I Googled this question: "why don

>First thing they should do is to cover propellers so that they don't hurt anyone. Does anyone know why this isn't standard? I Googled this question: "why don't quadcopters have safety cages" https://www.google.com/search?q=why+don't+quadcopters+have+safety+cages https://www.google.com/search?q=why+don't+quadcopters+have+s... ... ... and even saw cages that go around the whole quadcopter (not just the propellers as I was expecting). If those were a bit squishy they could seriously reduce any chance of concussion/property damage if landing on someone or something! The YouTube video below is pretty amazing, it shows someone demonstrating such a cage. "Spherical Cage Incased Quadcopter" - https://www.youtube.com/watch?v=5B3X6EvZ2XM https://www.youtube.com/watch?v=5B3X6EvZ2XM I've submitted it as a separate submission. (It's only 2 minutes.) He says it flies great, and he even seems to purposefully drop it several times from as high as the height of a building. Also for anyone who hasn't been around drones much, in the middle of the video you can hear the annoying whirring noise people mention throughout this thread.