Deuteronomy 18:20 “But if any prophet presumes to speak anything in my name that I have not authorized 27 him to speak, or speaks in the name of other gods, that prophet must die. 18:21 Now if you say to yourselves, 28 ‘How can we tell that a message is not from the Lord?’ 29 – 18:22 whenever a prophet speaks in my 30 name and the prediction 31 is notfulfilled, 32 then I have 33 not spoken it; 34 the prophet has presumed to speak it, so you need not fear him.”
(from net.bible.org)
Of course, this passage can also be misinterpreted and lead to religious wars. However, I do wonder if we would get a few less doomsday predictions…
Thoughts and Thoughts 