“Anarchists in the Aisles? Stores Provide a Stage” by Ian Urbina
“This is the season of frenetic shopping, but for a devious few people it’s also the season of spirited shopdropping. Otherwise known as reverse shoplifting, shopdropping involves surreptitiously putting things in stores, rather than illegally taking them out, and the motivations vary. Anti-consumerist artists slip replica products packaged with political messages onto shelves while religious proselytizers insert pamphlets between the pages of gay-and-lesbian readings at book stores.”
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Update: 01/15/08, Shopdropping video.