Is it wrong? No, because you’re not really consulting anything supernatural. The brain is a pattern recognition machine, which means when there is no pattern present, it will manufacture one. By using a pseudo-random medium, we can therefore examine the contents of our own unconscious processes by projecting them where there is no existing pattern, yet where the brain expects to find one. The best example of this phenomenon is the appearance of shapes and symbols which appear when watching “snow” on a dead television channel.
However, the Bible is very clear, if you’re a christian, you are not permitted to take advantage of these phenomena:
“When you come into the land which the Lord your God is giving you, you shall not learn to follow the abominations of those nations. There shall not be found among you anyone who makes his son or his daughter pass through the fire, or one who practices witchcraft, or a soothsayer, or one who interprets omens, or a sorcerer, or one conjures spells, or a medium, or a spiritist, or one who calls up the dead. For all who do these things are an abomination to the Lord, and because of these abominations the Lord your God drives them out from before you.” (Deuteronomy 18:9)