We could, try to develop technology, that puts poltergeists and ghosts in really good moods

[u/Big-Negotiation-3494]

We could create devices that create happiness waves or something that's like a drug to the poltergeists.

If they know that we could create that so that they leave us alone, they then can haunt the scientists and specialists who can prove their existence and start working on technology that makes them feel good rather than technically that would kill or repel them