Crewing aircraft with volunteers won't happen and even less them leaving the ground. Do you think it would be safe? It would take a long time to get all of those people through training! Pilots could be responsible for doors but do they have any medical training? Any survival training?
A chock-a-block 747 leaving LHR with a couple of pilots and some office people from Waterside. Don't even go there.
If you do get off the ground, enjoy your trips.