Been working on a rehab of a 1900's house and the PO's turned a bedroom into a bathroom. In the process they cut the studs of the closet and a pantry 6' above the floor, drywalled across the top to seal it off, took the original antique baseboards and cut them into 16" sections to seal off the pantry window on the outside and then put an electrical outlet in the window inside which was then sealed off behind a layer of linoleum flooring they glued to the walls to form a shower.
I've ignored the fact they removed all the plaster from the house but left the lath and drywalled over all it throughout the entire house. Oh, and their brilliant idea of using extension cords to wire in electrical outlets where ever they needed one. I'm glad I got the house for a song otherwise I wouldn't have taken it.