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    Teenager Deterrent

    The Mosquito, a device which emits a high frequency sound that only people under 25 can hear is being marketed as a way to disperse groups on teenagers.

    The annoying sound emitted from the Mosquito is succeeded at driving away scary 'yobs' in the U.K. Youth advocacy groups are calling for a ban on the devices.

    Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.