I feel like it should be pointed out that the definition of "concentration camp" has absolutely nothing to do with where people were "plucked" from or whether or not the government has a right to "pluck" them there.
"A place where large numbers of people, especially political prisoners or members of persecuted minorities, are deliberately imprisoned in a relatively small area with inadequate facilities, sometimes to provide forced labor or await mass execution."
I think we all agree that at least the "mass execution" part is unlikely, but that's also in the "sometimes" part of the definition. The "large numbers of people...deliberately imprisoned in a relatively small area with inadequate facilities" part passes muster, IMHO.