Sleeping passengers with their hands down their pants, used condoms and plenty of ugly bare feet are among the photos posted to a popular Facebook page devoted to in-flight faux-pas.
The Passenger Shaming page had more than 153,000 likes as of Monday.
The page's "About" blurb reads: "Are these a--holes serious? Photos taken by anonymous flight attendants & passengers from all over the world. Don't end up here."
A flight attendant posted the first pictures in January 2013 and passengers have joined in to share funny and sometimes disgusting photos.
Highlights include a woman straddling her male lover in coach; a shirtless, hairy, old man sleeping in his seat; and a passenger with corn and bunion-ridden bare feet.
Bare feet are a common theme on Passenger Shaming, with another photo showing a man trying not to notice that his armrest had been used to prop up the feet of the inconsiderate passenger behind him.
There's also a photo of a man sleeping across three seats, with his hand down his pants, as well another shot of a used condom.
The photos are published anonymously.