Spirit rescue is about helping a hurting person on the other side, no matter how de-testable they may seem to us. All people deep inside want to be loved, not hurting or lacking, and wish to be accepted by others; for we are social creatures. We have found that a majority of people who have remained here as earthbound spirits are afraid of what they do not understand, especially what happens next in their life-journey. Ghosts find themselves comfortable with the earthly plane, yet, by remaining behind, are focused on the past, though seemingly interacting in the present.
Explain to negative entities or any ghost, that by staying here they are missing loved ones who want to be with them; and, they needlessly suffer by not having inner peace achieved by letting go of the past. This is the key to rescuing spirits successfully.
Remember, most ghosts, including dark shadows, do not have bad intentions; but all ghosts need to be understood as being human spirits who are lost and in need of getting home. Helping the lost is what we should be seeking to do. Some spirits may not be willing to receive assistance, but we have nothing to lose in trying to heal every broken soul.