I used to work at a boy scout camp and the sh#t-na-pits were two holers with a divider. We would wait until someone sat down, and then go in the other side with a big rock. Throw the rock directly under the other hole, and the shittee got splashed with turd soup.
I worked in camps in the bush in northern B.C. for a few summers, doing geological exploration. It may only be stories, but I've heard of camps where at the end of the summer, the camp was shut down, with no plans to reuse it. At the same time, they had left-over explosives, from seismic work. (Lots of fun - blowing holes in swamps.) The explosives can't be returned or exchanged or stored, so they're used to blow up the outhouse on the last morning.
It's a good story, even if only a tale.
OT, A company named CIL used to make explosives. Up north, they used to talk about going fishing with a "CIL lure".
A common prank round my neck of the woods back before plumbing, was to move someones outhouse a few feet back, so that it sits behind the hole. When the person had to crap a night they would fall in the hole.
"Objects heavier than 3 lbs must be lowered by rope"
In another one down the trail, a guy had blackened about a square foot of the wall with a lighter and carved a righteous portrait of Hendrix into it. Only time I've wished I had a picture of the inside of a shiithouse.
In the winter, Rumney NH (a big sport destination) often gets a good bit of ice in. So the shitter in the parking lot still sees a bit of use all winter long. By the early spring as the first rock climbers arrive, they find a very interesting site: A ten foot tower of frozen sh#t ascending from the bottom of the pit. This fecal stalagmite can get within a few feet of the seat on a good ice season before it melts out. One of these years I wonder if it'll top out...