In a previous article, we wrote about a ring tone that only teenagers can hear. They use it to fool adults into thinking that they aren’t using a cell phone, such as in school where cell phones may be banned. Now, it seems, the adults are getting back at the teens, taking advantage of the sound to repel teens from hanging out in places where they are not wanted, such as in front of an apartment building, at the street corner or on school grounds after hours. But the device is highly controversial. Human rights activists and civil liberties unions … Continue reading →