Yeah ghosts are real most of them are just soulless energetic thoughtform replicas of a person that was made after they died, not the real person
As a matter of fact you can erase and get rid of them
Haunted places usually have a shit ton of lingering negative energy and ghosts causing problems which is why people tend to avoid them when they notice a place feels off or creepy and experience paranormal shit
Sometimes they can manifest physically which why you get reports of people claiming they've seen a ghost or see them in a picture