"What we do is try to inject a brief moment of wonder that helps wake them up from that rushed stupor. That’s the true holiday spirit, isn’t it?"

Shopdropping = planting some item of yours in with a store's merchandise.

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.

Self-published authors sneak their works into the “new releases” section, while personal trainers put their business cards into weight-loss books, and aspiring professional photographers make homemade cards — their Web site address included, of course — and covertly plant them into stationery-store racks.

Does it amuse you? Do you admire the shopdroppers? Or are they more like vandals?

This week an arts group in Oakland, the Center for Tactical Magic, began shopdropping neatly folded stacks of homemade T-shirts into Wal-Mart and Target stores in the San Francisco Bay Area. The shirts feature radical images and slogans like one with the faces of Karl Marx, Che Guevara and Mikhail Bakunin, a Russian anarchist. It says, “Peace on Earth. After we overthrow capitalism.”