Overcrowded conditions, altitude, and waiting for what may seem like forever can enrage even the most patient passengers these days.

The Instagram account @PassengerShaming provides an endless supply of prime examples — some of which are absolutely hilarious.

You never know when you’re going to be the “lucky one” and sit next to a person who wants to chat during the entire seven-hour flight or someone who can’t stop coughing and sneezing.
Passengers should understand that an airplane is a public space. All courtesy rules apply. Would you relieve yourself on the street if there was a restroom nearby? Or would you leave your newborn child on the floor or in the overhead bin?

Don’t be one of “those” people, but feel free to take a hint from some of the site's worst offenders.

1. The Drunks

A classic mistake passengers make is treating their flight experience like a booze cruise in the air. But the truth is, while drinking might take the edge off for some nervous fliers, it won't necessarily help you fall asleep. But it can definitely make you louder and more likely to disrupt fellow passengers and crew-- or even engage in some rowdy behavior.

2. Mean People

Why do you have to be mean to people who don’t even know you? No one on the plane is to be blamed for your bad mood, so none of them deserve to be victimized. Being humble and kind will get you a lot more than whining and complaining during the entire flight. Don’t get in fights with people waiting to use the restroom and stop talking about how much you don’t like plane food.

3. Smelly Passengers

A passenger once claimed he was not allowed to board because he smelled too bad. The airline denies the allegation but there is a video showing a staff member telling him that the crew and passengers had been complaining about his odor. He alleges that he was told that the captain had the right to refuse him, and that he should take a shower before coming back to the airport. True or not, no one should ever be able smell someone else’s body odor (or super flowery perfume), especially on a flight.

4. Those With a Contagious Disease

Where do you think the germs you’re coughing are going to go? They will land on someone else, who will then touch their nose, mouth or eyes...and then get sick. This vicious cycle should be avoided if possible. Do you want to be responsible for getting a child sick or for starting a mini-epidemic?

5. Screaming Kids

You can’t really blame a baby for crying — it could be hungry, tired, or uncomfortable. They can’t express their dissatisfaction any other way. Kids, however, can. Anyone older than 3 years old should understand that screaming for hours is not doing anyone any good. Some children-- and more importantly some parents-- don’t seem bothered by that unwritten rule.

6. Those Obstructing Your View
Congratulations for having the ability to grow long and beautiful hair, but you don’t have to hang it over the seat, blocking the TV of the person sitting behind you. That’s just rude. If your hair is in the way, just use a hairtie to keep it away from your face. A flight attendant may even be able to supply you with a fresh accessory.

7. Those Who Can’t See the Toilet Seat

Believe it or not, instances where people have urinated in the lavatory sink or outside the toilet have been documented and posted on Instagram. It's unclear why anyone would engage in this type of behavior but it's definitely not recommended.