The Mosquito

Has anyone heard about the "Mosquito"? Not the actual bug, but the special tone-buzzing device designed to keep young troublemakers away? I heard about it on the radio this morning for the first time. Pretty funny, actually. So in the UK this guy made this thing that they are calling the mosquito to keep the young "troublemakers" out of a particular shopping mall/problem area because of the criminal damage happening to the shops. The buzz can only be heard by people 25 years old and younger. The longer the sound is heard, the more annoying it becomes, so it's designed to drive them away. Older people cannot hear the tone for some reason. So apparently it's been working and the crime has gone down since this bug was put in effect. Here's the funny part...the kids were able to download this same buzzing noise somewhere on the internet and were able to make it a ring tone for their cell phones. So now these kids have their phones turned on and they are ringing in class, and everyone can hear the ring except the teacher. Clever little rebels.