I believe spiritual people can talk and maybe hear from "the dead." Both kinds of spiritual people... good and not so good.
The Bible tells us that the rich man in hell spoke to God and asked that the prophets be sent to his family so they wouldn't suffer the torment he was suffering. He could also see across the gulf to what was then paradise.
God created everything for good. That this power is there means, to me, that it's open for use by anyone. Myself, having part of God, the Holy Spirit, dwell within me means that power is within me, too. Whether God allows me to utilize it or not I guess is up to whether I am ready or can handle it???
My point is this: if someone has such power, it comes from God, originally, and is in the universe for use. What they do with it is up to them.
People who are Godly, will use everything they have for God. Those who are not Godly, well, they can't use anything they have for God, but He can use it through them if no Christian rises to the challenge.
I guess it depends upon Whom does it edify? If it edifies us, then it's wrong. If it edifies God, it's good.

IMO