I don't think it's protection against any sort of scans as much as it is that few people other than Displaced know where the safehouses are.
[So more of a simple matter of staying out of sight rather than some sort of shielding, as far as he's aware. But as for the first question, he sighs a little and crosses his arms, a faint trace of annoyance crossing his expression; it isn't at Sephiroth, but at the memory of a discussion about this topic.]
Technically, it isn't that new arrivals are locked in, it's that the door can't be opened without a registered ID. Of course the door could just be left open, or Displaced with IDs could open it for new arrivals who want to leave, but why that shouldn't be done has caused a lot of...
[Give him a moment to find an appropriately neutral term while still getting across just how unimpressed he is with this whole setup--]
no subject
[So more of a simple matter of staying out of sight rather than some sort of shielding, as far as he's aware. But as for the first question, he sighs a little and crosses his arms, a faint trace of annoyance crossing his expression; it isn't at Sephiroth, but at the memory of a discussion about this topic.]
Technically, it isn't that new arrivals are locked in, it's that the door can't be opened without a registered ID. Of course the door could just be left open, or Displaced with IDs could open it for new arrivals who want to leave, but why that shouldn't be done has caused a lot of...
[Give him a moment to find an appropriately neutral term while still getting across just how unimpressed he is with this whole setup--]
Spirited debate.