Who would know that he had handed over Pi/c to his right seater when the accident happened?
Nobody; so it would be your word against theirs and if you were dead they would probably win!
i wonder whose idea it was originally to establish the PIC seat is the left seat?
It is based upon the passing conventions to give the pilot a better view of opposite direction traffic. Conversely; why do we drive on the left in the UK? Well, its because Coach doors were always on the left. Why you might ask? Because most people are right handed and when drawing ones sword for protection, it was best that you keep potential enemies on your right and you unprotected side to the left. A pitty boats didn't have doors in the side because aeroplanes opted to follow the nautical convention. I gather some NASA vehicles were based on the width of a railway track which was determined by the spacing of charriot wheels that was based on the width of a horse's arse.