On the first Spring-like Sunday of 2003, kids at the Astor Place Kmart were treated to an unusual sight: the Easter Bunny getting cuffed by New York City cops. Amy Hamilton-Thibert, a 28-year-old mother from Astoria, Queens, came to the “Big K” in a bunny outfit to protest the sale of military-themed Easter baskets she had read about in a Village Voice article…