Duplication of so many people on such a vast scale seems completely impossible to me... and it raises a surprising amount of ethical questions as well. If we are going with your analogy of copying pieces of paper, then that means that those of us here are "copies" of the original existing person... if that is the case, then what real significance do we have? Surely other copies can be made... and if we did return home, then what place do we have in the world we left, particularly if the original still exists? Is the original's life our life anymore? Who has proper claim to it? As a copy of an original, we are inherently without a proper place anymore, given that that place is either occupied by the original or...

If we have been physically taken from our world, then if one died, there would be no body to encounter. If we have been copied from an original source, we'd come back to find our own dead body... I feel this should raise some metaphysical paradoxes of some kind. Something like that seems like it would deliberately be going against the natural order of things, perhaps even the laws of physics itself... essentially creating matter from nothing. But again, duplication of matter is not possible as far as I'm aware. Perhaps things are different here somehow...