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Published: Sep 03, 2014 6 min read
Reclining airplane seat into passenger's knees
Jason Hetherington—Getty Images

Two recent passenger squabbles on airplanes have greatly boosted the profile of the Knee Defender, a $22 device that can be attached to the back of an airline seat to prevent it from reclining. The device prompted a brawl on a recent United Airlines flight from Newark to Denver, causing the plane to be diverted to Chicago, where both the man who attached the Knee Defender and the woman who didn't like it (and threw a glass of water at the guy behind her) were escorted off the aircraft. Sales of the device soared after the news of the incident went viral, and plenty of observers weighed in with opinions, some defending the Knee Defender, others bashing it and anyone who would selfishly prevent a fellow passenger from "right to recline."

Many others lamented the apparent need for such passive-aggressive behavior in the first place. Ira Goldman, the inventor of the Knee Defender, said the airlines are to blame for these ugly incidents because they've reduced legroom. By extension, the airlines are also to blame for the newfound popularity of his odd gadget. “When the airlines solve the problem, I’ll go out of business,” he said.

Flying is hardly the only sphere where humans have been known to exhibit uncivil behavior, and where others feel forced to resort to passive-aggressive (OK, sometimes more aggressive than passive) strategies as a counteroffensive. Here are some other products for the passive-aggressive people in your life.

The Parking Chair
People in Boston, Chicago, and other snowy cities regularly use chairs (or ironing boards, or buckets, or oversized kids' toys) to call "dibs" on the street parking spaces that they dug out in front of their homes. The passive-aggressive tactic for defending one's spot is popular but often illegal. In fact, a "No Savesies" movement was launched via social media by police in Philadelphia to spread the word that savesies, dibs, or whatever you want to call it is not allowed.

Spike Away Vest
Tired of fellow commuters bumping into her or otherwise invading her personal space, an industrial designer in Japan created the Spike Away vest, a plastic, porcupine-like accessory sure to keep strangers from rubbing up against you on the train.

Slogan T-Shirt
Rather than boldly confronting those exhibiting boorish, insensitive, or just plain dumb behavior, the passive-aggressive have been known to wear certain T-shirts as a way to get across a message—and perhaps their sense of humor as well. Here's one offering the message "Thank you for not crop dusting" (a.k.a. farting).

Office "Courtesy" Signs
The office, a mishmash of different personalities from different backgrounds where everyone is expected to behave professionally and politely, is always a hot spot for subtle passive-aggressive behavior. And sometimes overt and totally juvenile passive-aggressive behavior too. Signs posted at cubicles ("Quiet Please… Important Work in Progress") and in office kitchens are often rife with passive-aggressive intent.

Bumper Stickers
Pretty much every bumper sticker is passive-aggressive—a means to get some sort of message across without saying a word or doing much of anything besides driving around. Like this one, which aims to keep would-be tailgaters at bay: "Sorry for driving so close in front of your car."

Toilet Decal
Confronting people in your house about their refusal to put the toilet seat down is so, well, confrontational. It's also difficult to do in the middle of the night, when said people are probably barely awake. The passive-aggressive solution just might be a glow-in-the-dark toilet decal with the reminder to lower the seat after relieving oneself.

Curb Your Dog Signs
"Please Don't Water Our Plants!" one Curb Your Dog sign pleads, showing a pooch peeing on what's presumably a garden. "Make Sure Your Dog Doesn't Drop Anything," another sign warns, showing a dog doing something worse than merely peeing. Either option is nicer than putting a fake headstone on your lawn marking the spot of "The Last Dog That Pooped in My Yard."

TV-B-Gone
OK, this one is probably more aggressive than passive. The TV-B-Gone gadget hit the marketplace in the mid-2000s, allowing anyone to turn off a TV blaring CNN or whatever at the airport or some other public venue. Tranquility at last!

The Ordinary Cellphone
Nearly everyone is in possession of a tool that makes it incredibly easy to passive-aggressively avoid talking to people or even making eye contact. According to a Pew Research Internet Project survey, 13% of all cell phone owners—and a whopping 30% of millennials—say that they have pretended to be using their phones for the express purpose of easily avoiding interactions with people they come across.

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