[gela]

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A controversial device that emits an irritating high-pitched noise to disperse loitering youths has launched in Australia. The gadget, named the Mosquito, emits a shrill high frequency ring that targets the sensitive hearing of teenagers. Listen to a similar high frequency alarm here. Shopkeepers in the UK are using the 20cm black box to disband teens, while blissfully unaware adults continue shopping. However, campaigners claim the pulsing sound, which travels 20m, has adversely affected many young people and may breach human rights standards. ... "These devices are indiscriminate and target all children and young people, including babies, regardless of whether they are behaving or misbehaving."

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The biggest security concern for construction companies today is liability for injuries to unauthorised persons on building sites. This is often the result of kids gaining access to a compound and using it as a play area after work has finished for the day. Conventional security measures used on temporary compounds are ineffective. The system boasts climb-over and break protection and the intelligence systems capable of determining the difference between those instances and incidental occurrences such as animal incursion, high winds, impacts etc. All this with a false alarm activation rate of just 1%. ... The chances are that if you are over 20, you will never have heard of it. But if you are a teenager in the habit of hanging around causing trouble, it could well have sent you and your mates packing. The Mosquito, which emits a sound that can be heard only by the young, has been quietly clearing shopping precincts around Britain for the past two years. Yesterday, however, the Children's Commissioner for England provoked a furious backlash after demanding that the device should be banned - because it is an infringement of yobs' human rights.

Yay or nay?
Me? I have no problem with them on construction sites, but not at shops. After all, it hurts babies aswell, and it hurts all young people indiscriminatly - I don't want that noise in my ears when Im just driving past or buying some food.