It has been done before.......... reminded me of an early 60's kids ITV sci-fi serial that I loved.
The seventh episode of Pathfinders to Venus (The Valley of Monsters) was used in an academic study of children's attitudes to television viewing. The experiments included showing several on-screen mistakes which were explained at the end of the episode by onscreen-rolling captions:
The mistakes in this episode which you may have noticed are not accidental. They are part of a research project into children's perceptions which the Department of Education of Cambridge University is carrying out in co-operation with the Drama Department of A.B.C. Television.