When an ad hoc team of 5000 people who assembled in just two hours found 10 weather balloons hidden across the US by the Pentagon's research agency earlier this month, it was just another demonstration of the power of crowdsourcing – solving a task by appealing to a large undefined group of web users to each do a small chunk of it.
So far crowdsourcing has been associated with well-meaning altruism, such as the creation and maintenance of Wikipedia or searching for lost aviators. But crowdsourcing of a different flavour has started to emerge.
Law enforcement officials in Texas have installed a network of CCTV cameras to monitor key areas along that state's 1900-kilometre-long border with Mexico. To help screen the footage, a website lets anyone log in to watch a live feed from a border camera and report suspicious activity. A similar system called Internet Eyes, which pays online viewers to spot shoplifters from in-store camera feeds, is set to launch in the UK in 2010.
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