About as good an idea as the two story, stacked outhouse.
Kind of remember an ‘open’ bay atmosphere in boot camp and on some Naval Transports and prisoner would not mind the extra facility in their holding cells.
Also, remember the two seater outhouses....
One time a guy went in and was doing his business in an already occupied 2 seater and as he was getting up two quarters, a dime and 2 nickels fell down into the steaming receptacle.
He calmly reached in his pocket and threw a 5 dollar bill after the change.
His mate said
“You must be crazy throwing that fiver away!!”
“Crazy?, don’t think I am going down there for 70 cents do you?”

As a one owner-operator of one, I can tell you that the 'holes' are not for company, but comfort and safety. One of them is sized for adults; the other is smaller & set closer to the front; sometimes even lower, to keep the younger kids from falling in. It's the outhouse version of a potty chair or 'booster seat'.