Gun owners who have to have the biggest caliber weapon due to the misconception that smaller caliber weapons don't have enough stopping power and will not put an attacker out of commission before he hurts you.
Jack: I'm thinking about buying a 22LR handgun.
Bob: If you have to use it, the attacker is gonna keep coming if you shoot him with that. Best get you a .357 to be safe. More stopping power.
Jack: Nobody wants to get shot with any gun. Quit being a caliber nazi.