Opinion
KEY POINTS:
Two schools and a stadium in South Auckland have been fitted with an alarm which emits an annoying sound that only people under 25 can hear
The Mosquito Anti-Vandal System - labelled discriminatory against young people by overseas human rights groups - has been installed as Papakura council attempts to stamp out graffiti tagging and other offending in the area.
The electronic alarm, imported from Britain by an Albany company, is set at about 17.4 kHz and can generally be heard only by people under the age of 25 as the ability to hear high frequencies deteriorates with age, a condition known as presbycusis.
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