This is more of a mental error instead of plain lack of knowledge, and it pales on the amusement scale compared to an anchor in a pack or using paddles backwards, but on an early trip some dude with a new tent was making a big show of putting up the aforementioned tent.

All finished, he unzipped the rain fly to get inside and met a "wall." Seemed he put the door on the other side of the tent.

"Flaps go on the other side, flapboy," someone helpfully called out.

Henceforth, doing something stupid in the Q (sitting on your glasses, misreading a map, snipping off the working end of a line or rope instead of the standing end, or using the Nalgene with the clear liquor in it instead of the one with water to mix up pancakes, which happened this past trip) has been referred to as "pulling a flapboy."

-- kypaddler

As far as other groups, we generally try not to snicker too much at the things we see. Lord knows what other people think of us.