I can remember reading one of i think it was an Anson on an airtest when they had major problems and the pilot told the lad they had took along they were going to bail out, at that point several other worried faces appeared behind him, none of which had chutes... luckily he managed to get it back on the ground....
The worst must have been the FW190, during the invasion when moving fwd to operating bases they would shove a member of the groundcrew through the maintainance hatch into the rear fuselage and panel him in, often pilots who had the chance to jump when attacked by Allied aircraft elected to stay with their plane in a vain attempt to save the person in the back...
What the RAF came up with to transport people on a Spitfire with was erm so frightning they couldn't get anyone to test it, including the inventor.. it consisted of a glorified bodybag with straps that looped over the canon stubs on the leading edge!!