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In early September New Yorkers may have noticed an unwelcome guest hovering round their parties. In the lead-up to Labour Day weekend the New York Police Department (NYPD) said that it would use drones to look into complaints about festivities, including back-yard gatherings. Snooping police drones are an increasingly common sight in America. According to a recent survey by researchers at the Northwestern Pritzker School of Law, about a quarter of police forces now use them.
Even more surprising is where
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