So one of the university buildings here has the wonderful washroom design where the stalls have massive 3/4" gaps in the door and said gap is aligned such that it's dead centre to the washroom entrance. I've always questioned who ever put those stalls in.
Bonus, the washroom is one of those newer design ones that don't have doors between the corridor and the washroom.
Anyway a metal plate on the door should cover up said gap.