That would totally contradict the fact that Samael has already regained his first/last memory...
But on a side note.
To further your idea, Foxy, if this IT thing was the one keeping them there, why not have the medicine they are forced to take on a daily basis, to be part of the reason why their memories cannot come back? Yes, one of the reason would be because they were shut. But some people (Aaron, Samael... etc?) have flashbacks, dreams, and they draw it out, which should be enough to trigger the memory thing. But it doesn't. Why? Because of those meds they are taking. It forces them not to see the 'truth'.
Wow, this is like some sort of weird... movie thing...
Anyway, besides that, to incorporate your idea, there could be a barrier like thing around the institution, and once they escaped that barrier, their memories return. ^_^ Of course, the meds thing was introduced so I could modify it to fit Sammy's recent bout of memories, since medication does not work on him as effectively as it does on... ah... another person.
So, so? How? Is Neko's further elaboration of an idea which totally means I stole it, okay?