Sgt. Pepper
All you need is love.
I have heard this theory before. Do you have any thoughts on what seems to give this energy some intelligence? For example, it might slam a particular door or seem to target a articular person. Or it could burn or throw certain religious symbols but not random items.
Or do you see this as just random energy release?
Although I haven't personally witnessed any poltergeist activity based on this second theory, I've heard that intense emotional stress plays a role. Another name for it is spontaneous recurring psychokinesis. It's a theory that suggests that extreme emotional tension can inadvertently project outwards in the form of mental energy, which can affect the physical world and cause poltergeist activity.
But, as I previously stated, I have more experience with the first theory and believe it to be the most likely explanation for almost all poltergeist activity, but I could be wrong. Learning about this particular phenomenon is fascinating, as is all things paranormal.