"The act alone is awful ... but that guy sitting there, is that his laundry or is he just ok with someone's dirty crotch swimsuit hanging over his tray table? I'd throw it on the floor over and over," one person wrote.
Another said: Disgusting, make sure you bring wet wipes so you can clean off your seat before you sit in it.
However, some saw no issue with their togs hanging out on seats.
"It's a pretty empty flight. Looks like no one sitting in the row being used for laundry," one person said in their defence.
A second person joked that at least it was better than them hanging a "dirty diaper" over the top of the seat.