Here Phillip Jensen gives some personal testimony regarding the dangers of the modern prophetic (or modern pathetic) movement. If you don't come away with your blood boiling and wanting to punch the bloke who made the second 'prophecy' you're a better person than me. I'll give Phil the last word:
It is not enough to write off these latter day ‘prophets’ as eccentrics, for they damage the sheep of Christ, and in their public statements often bring dishonour upon the name of our Lord and Saviour. In their teaching and training, they misrepresent the work of evangelism and the message of God in this world. We must not do nothing as John Wimber comes to town again to continue spreading new ways of being in touch with God. We have to warn, teach and publicly disassociate ourselves from these ministries, for ultimately it is a different Christ and a different gospel that they preach.