Horror stories were relayed on the Q&A website Quora - and one of the most recurring stories involved passengers watching adult videos. Nice.
See also: Silliest ever airline passenger requests
See also: What flight attendants are really thinking
Attendants also say that they can't believe how many passengers think they can get away with joining the 'mile-high club' - especially those who are just in their seats and covering themselves with a pillow.
Then there are there passengers who are just plain stupid. Like the one who complained about turbulence and demanded the flight attendant make the turbulence stop.
Other annoyances expressed by flight attendants on the site included passengers handing them dirty nappies and sick bags, not saying please or thank you, and taking off their socks and shoes.
What's the worst behaviour you've seen while flying?