Steve, do you mean disincarnated entities? Was the entity you are speaking about harassing you?
Yogananda spoke amply about tramp souls which are evil spirits, but you are probably referring to other kinds of entities as well, not necessarily evil.
I think the best way to describe the particular spirit I’m referring to is; mischievous 😏
Brother Bhaktananda advised me to encourage ‘Brian’ to move on because staying in limbo as a disincarnate soul was not good for its spiritual welfare. Although I will admit that it opened up many answers to me about death and dying. I asked Brother Bhaktananda if the ‘spirit’ was real and he answered in his usual manner…. Slowly and thoughtfully and then the response; “Yes” That was decades ago now since I’ve heard from ‘Brian’.