I can only assume they're trying to hurt people in more ways than just the physical. Sieghart had a theory that these were actually meant to help in some way, in that they got something out of it in the end, but that would be a pretty fucked up way to go about it.
I don't know about help, but I have wondered if the sinister versions of people here aren't meant to point to what is going on on a broader level. The Dorm Heads for example all seem to have had their memories altered; they may be using false names.
no subject
no subject
Maybe it is true of the killings as well?
no subject
If that's the case, though, we're being used more than expected.