Reading the title, I thought "ultrasonic" was some evil site that paid for people to use their beacon... Reading the article, it's actually worse! This sort i

Reading the title, I thought "ultrasonic" was some evil site that paid for people to use their beacon... Reading the article, it's actually worse! This sort if things should be taught in school, don't give an apps permission to your mic, GPS, camera, contacts, etc... Unless you understand why. Not everybody will write "hello world" in JavaScript in their life, but most people will installed apps on a device.