(cut for s7 Doctor Who spoilers)
It just occurred to me to wonder what the Machine would consider an angel displacing someone in time. Would it have any concept for, say, Rory being zapped back in time at the beginning of Angels Take Manhattan?
Perhaps Shaw and Reese lurked just around the corner when Rory was lost. Would their watching have stopped the angels in their tracks?
Does the Machine watching stop the angels? The Machine isn't a person, and the angels are quantum-locked--and the Doctor says that it's through observation that they can't move.
The Machine observes.
More disquieting: to look into the eyes of an angel is to become an Angel. Also, no images, because they become angels, too.
An angel ghost in the Machine. Would it understand what had happened to it?
Has Finch encountered the angels before (out of all of them, he seems the most likely to understand)? Reese isn't omnipotent, and neither is Shaw. Carter would notice people missing, but only if related to a case she was working on. Zoe Morgan has probably heard rumors of them, and stays the hell away.
Why did the angels choose that time and place (19whatever). Why not settle down in the NYC of today?
Winter Quay isn't time-locked, it could happen in the here and now.
Would Root try to use the angels in her schemes?
Why is it this kind of idea that occurs to me, and not ideas for my rarewoman assignment. sigh.