To paraphrase Nina Sharp, "Massive Dynamic creates technology. What others choose to do with it is NOT our concern. We just own the patents." Insert wry smile. But only in Bizarro World would a company create a nanny-cam with the capability to do what they did with it. It's use in that episode is "deus ex machina" - even though it is a minor example.
"A deus ex machina (play /ˈdeɪ.əs ɛks ˈmɑːkiːnə/ or /ˈdiːəs ɛks ˈmækɨnə/ DAY-əs eks MAH-kee-nə; Latin: "god from the machine"; plural: dei ex machina) is a plot device whereby a seemingly unsolvable problem is suddenly and abruptly solved with the contrived and unexpected intervention of some new event, character, ability, or object. It can be roughly translated as "God made it happen," with no further explanation, and, depending on usage, is primarily used to move the story forward when the writer has "painted himself into a corner" and sees no other way out. However, in other cases, it is used to surprise the audience, or, commonly influenced by editors and/or publishers, bring a happy ending into the tale."
It surprised me a bit last year when Astrid and Walter used this very term to describe how the Observers seem to function. It was one of my favorite episodes, "Making Angels." (I thought it was brilliantly acted by Jasika Nicole.) The red Astrid's father dies and she flees to the other side to try to come to terms with the death by meeting her other self. In science fiction, the term "deus ex machina" carries a generally negative connotation, which I'm sure did not escape the Fringe writers who used it overtly in their own script. Still, it was a clever justification of the use of the technique, in that it does fit the almost magical powers the Observers seem to possess. With one stroke in that episode, they poke a little fun at the times they've gone to that well, while at the same time absolving themselves for using it as often as they do. Clever little boys and girls.