For those who've been studying the skeletons in the graveyard and the bodies of NPCs and doubles, what's the deal with the skeletons in the cistern? Do they, like the graveyard skeletons, seem to be "normal" skeletons that aren't a little bit off the way NPCs and doubles are?

Per this quest effort, John can create bone platforms over the acid. What will happen if he (and perhaps some friends going on a field trip) explore deeper into the cistern on these platforms of bone? They would not spend more than a few hours exploring, and they would turn back if they encountered new hazards.