Hauntings do happen. The question is...BY WHOM...
It cannot be people who have died because the Bible says;
(Ecclesiastes 9:5-6) For the living are conscious that they will die; but as for the dead, they are conscious of nothing at all, neither do they anymore have wages, because the remembrance of them has been forgotten. 6�Also, their love and their hate and their jealousy have already perished, and they have no portion anymore to time indefinite in anything that has to be done under the sun.
So the only other explanation is ; Demons.
They DO exist. The Bible confirms them. Matthew chapter 8 and Luke chapter 8. The example of the demons [in the man/men] who were ordered into the pigs, and those same demons identified Jesus as the SON of God. Thjey knew Jesus was NOT God himself. The greatest proof in the Bible AGAINST the TRINITY teaching.