According to Phil Bourjaily these are the six worst shotguns of all time. A very odd collection:
Browning Citori 425 Women’s Shooting Sports Foundation Edition: The Blue Ox
Kmart Boito Double: The Blue Light Special
Marlin Goose Gun: The Pipeline
Remington 870 16-Gauge: The Frame-Up
Smith & Wesson 916: The Rock of Sisyphus
Winchester Super X2 “Greenhead”: The Gutter Ball
More info of these shotgun here.