It doesn't scale -- the more you do it, the more likely one of them is to squeal or be caught, then MSS would be leaking their priority target list straight to

It doesn't scale -- the more you do it, the more likely one of them is to squeal or be caught, then MSS would be leaking their priority target list straight to the the FBI. Instead they would carefully target people with access, but not necessarily force them to divulge information / tamper with systems except when they really need it.