The TV reminds me that on this date, lunatic John W. Hinckley, Jr. took potshots at President Ronald Reagan, seriously injuring Press Secretary James Brady.
In the wake of this tragedy, Mr. Brady's wife had a choice; she could blame the crazy guy who pulled the trigger, and work to improve detection and treatment of such person, or she could blame the gun in his hand.
A logical, reasonable person might point out that a gun without John W. Hinckley, Jr. at the trigger is just a collection of inert parts, while Hinckley without a gun can still carry a stiletto or a can of hairspray and a lighter, or a flask of sarin.
Sarah and James didn't see it that way.
So much for "common sense."