I like the idea. Limit the list to those 'someone' deems trustworthy. We could pass two or three cameras around simultaneously. I recommend some low-end unremarkable cameras, like a Nikon EM, Canon AE-1 (I have one I'm not using), Pentax LX... Alternatively a loaded medium format camera back could be used, especially if we scare up some 220 film. (I have several spare M645 backs and 220 inserts available.)
Participant list would be fairly short, shipping cost advertised up front. Everyone sends the leader a $1000 deposit for participation, and away we go. I'll be the first leader!