Obnoxious people are everywhere. Including on airplanes. These are people who just don't know how to act like proper passengers. There's a Facebook page and Instagram account dedicated to publicly shaming these people now and it's called Passenger Shaming.

No shirt required.

The reason the armrest was there for.

In-air PDA.

Taking up the whole row.

Leaving a toilet paper trail.

Is this even comfortable?

Should have taken business class.

Vandalism.

Oops, someone left their teeth behind.

Probably one of the grossest people to sit next to.

The legs-up guy will definitely get some stares.

Total privacy wanted or body bag? 

Newspaper blanket.