On YouTube and in churches, they are backlit with moving stage lights, music playing, shouting into a sound system, being recorded, whipping the audience into response, waving their arms around, squinting their faces, imbuing God's name, enlarging every particular component of their speech with overstatement.
Does the authentic Word of God need all of this sales pitching, or just plain utterance?
Then nothing of their prophecy specifically occurs in the future having the significance they assigned to it, regardless of how many people believed God in faith for it.
All of this speaks folly.