Dweeble:
So what's everyone thinking the room is about? Ritual sacrifice? Penance chamber?
That the boy wasn't killed, that the cages just temporarily trap instead of killing (or delay us from running away from ranged attacks or deadly traps), and that the stone masked men let the quarry men see them; makes me think they're thinking that people will join them, rather than that they want to do something in secret.
A cult that thinks they're doing the right thing and that others will agree, is super scary.