I'm pointing our that throughout history there are are many reports of possession and because of this possession the entity has seriously interacted with humans.
Rosemary Guiley, Demons & Demonology, p.198 " possession - The takeover and control of a person's mind and body by a Demon, condemned soul, ghost, spirit, or deity. ....In demonic possession, a demon takes up residence in a person's body and influences or controls his or her thoughts, words, and actions. "
The possession has 3 stages - infestation, oppression, Possession. Even mediums and channelers are voluntarily taken over by an entity for a time.