Earlier this month, my iPhone vanished.

I looked up its location on an app called Find My Friends that my wife and I use, and I had a shock: The app said my phone was in a house 15 miles away, in a neighborhood that I’d never visited. I drove there. It was night. The house looked creepy.

My wife stayed in the car, cellphone in hand, ready to summon the cavalry. I walked to the front door and rang the doorbell.

Nothing. The lights were on, so I rang again and knocked hard. I spent five minutes ringing the doorbell and pounding on the door. Finally, a man emerged.

“I think you have my phone,” I explained tautly.

“Your phone?” he asked.

“YOU HAVE MY PHONE!”

“Oh,” he said, “your phone.” He pulled it out, still with my name, email address and office phone number pasted on it, and meekly handed it over.

I left, no questions asked.

Full of myself, I posted about the adventure on social media — and provoked a firestorm. A typical comment on Facebook, from Glenna: “Are you insane?”

Many followers scolded me while others — particularly those abroad — expressed bewilderment that it should be dangerous to knock on a door and ask for one’s property. Heidi asked: “What kind of society do we live in when knocking on someone’s door to retrieve a lost iPhone becomes perceived as life-threatening?”

Put aside the question of whether I was a knucklehead. Isn’t there a larger question of why we tolerate a society so bristling with guns that such a quest may be perilous? Aren’t we all knuckleheads for tolerating such a threat? About one-third of American households have guns, according to a Pew survey (a bit more, Gallup says), and these firearms kill 32,000 Americans a year, according to the Centers for Disease Control and Prevention.

Sure, there are cases where guns are successfully used for self-defense, but a study in the journal Injury Prevention found that the purchase of a handgun was associated with 2.4 times the risk of being murdered and 6.8 times the risk of suicide. Several other studies confirm that a gun in the house significantly increases the risk that a person in the home will be murdered or commit suicide.

Partly that’s because we misperceive the risks. We imagine a home invasion, but a study in the American Journal of Epidemiology found that 76 percent of homicide victims knew their assailant. That study also said that men with guns in the home are 10 times as likely to commit suicide in the home as men without a gun.

With so many guns, often kept loaded without trigger locks, the collective toll is enormous.

The simplest baby step forward would be to institute universal background checks before gun purchases, to prevent sales to criminals. That was favored by 92 percent of Americans in a poll last year, as well as by three-quarters of members of the National Rifle Association. Yet the NRA leadership is so extreme that it fights even such a step, and craven politicians buckle to its will.

I may have been a fool for trying to reclaim my phone. But we’re all idiots for accepting a society where knocking on a door is a deadly risk.