My old college house we used to shoot paintballs at them. It took awhile but they learned. It was hilarious cause every once in awhile youd seee one with some paint on it! We had different colors so we knew who hit the racoon. We eventually made the landlord get a better dumbster. It was just to accessable to critters. The key was to get the neighbors to call. They liked us cause we kept the place nice unlike previous tenants. Shoveled driveways and what not. Kill 'em kindness hahahaha!!!