The city played possum -- and Brooklyn residents lost. In a bizarre attempt to outwit Mother Nature, city officials introduced beady-eyed opossums in Brooklyn years ago to scarf down rats running amok in the borough, according to local officials. Surprise: Operation opossum didn't work. Not only do wily rats continue to thrive, but the opossums have become their own epidemic, with bands of the conniving creatures sauntering through yards, plundering garbage cans and noshing on fruit trees. They've even taken up golf, with two sightings of the whiskered marsupials at the Dyker Heights municipal course in the past week, local officials said.