No, because not only can they NOT tell the future, but they commune with evil spirits....not the spirits of the dead, because think of this: for someone to be dead, how can they then commune with you still? why pay all that money for a funeral?
"For as the body without the spirit is dead, so faith without works is dead." -James 2:26
"Till you return to the ground, for out of it you were taken; for dust you are and to dust you shall return" -Genesis 3:19
Not here to bash your beliefs, or to convict you of anything because that is the Holy Spirits area (John 16:13). For example, let's say we did become spirits after death, then apparently you should be able to detact them in an xray, right? but that cannot happen. a spirit cannot bleed, but we all bleed. secondly, if we all went to heaven at death, then why does the bible clearly say that Christ is returning again? (Revelation 1:7, 1 Thessalonians 4:16,17, 2 Peter 3:10). Even Christ did not go to heaven or hell at death; He stayed in the tomb. Why would Jesus come back to earth if everyone was already in heaven or hell? Why would He have went to heaven at His death and then just come back to lay in the tomb? Absolute foolishness.
The bible condemns consulting psychics and mediums, witches and everyone of the sort who does those things.
"You shall not permit a sorceress to live" -Exodus 22:18
"There shall not be found among you anyone who makes his son or daughter pass through fire, or one who practices witchcraft, or a soothesayer, or one who interprets omens or a sorceror" -Deuteronomy 18:10
"A man or a woman who is a medium, or who has familiar spirits, shall surely be put to death; they shall stone them with stones. Their blood shall be upon them".
"And when they say to you, 'Seek those who are mediums and wizards, who whisper and mutter', should not a people seek their God? should they seek the dead on behalf of the living?"- Isaiah 8:19
"So Saul died for his unfaithfulness which he had committed against the Lord, because he did not keep the word of the Lord, and because he consulted a medium for guidance. But he did not inquire of the Lord; therefore He killed him, and turned the kingdom over to David the son of Jesse." -1 Chronicles 10:13-14
When people die, they know nothing. When we die, we lay rotting and decaying in the dirt. Forensics dig up bodies all the time to gather evidence, and when the coffin lid is popped open, inside is the rather rotted remains of the person who died.