The provenance of suicide bombers, mass murders, serial killers and other seriously evil people, especially those who commit suicide in lieu of suffering earthly punishment for their evil acts is much darker than the “ordinary” suicide. These people have been the cause of the intentional death and disfigurement of other innocent souls. To my knowledge, psychics and mediums do not tend to make contact with this sort of spirit. For this reason, what happens to them after their deaths is mostly speculation, but there must be a reason that they remain incommunicado indefinitely after their evil acts. The easiest explanation is that these spirits spend the remainder of what would have been their earth lives on the darker planes, below the planes of illusion. Their exile to these dark regions would insulate them from any contact with the earth, and implies that their fate, even after what would have been the remainder of their natural lives, is darker and more distasteful than that of an “ordinary” discretionary suicide.