After Harold Camping repeatedly missed it on his rapture predictions, he finally admitted his statement was sinful. He even wrote a letter to the body of Christ apologizing for his end-of-the-world dramatics.
And that's rare—indeed, too rare.
Most prophets of doom refuse to acknowledge they missed it with clearly dated—and clearly failed—prophecies of asteroids hitting Puerto Rico, earthquakes making the Florida Keys no more, tsunamis putting South Florida completely under water, man-made disasters worse than 9/11 hitting New York, a major government official taking a bullet through the heart, earthquakes splitting the United States down the middle and ... shall I go on?
I am not sure where most of these poor prophecies started so I can't trace them back to their misguided root and call out names. You'll find a number of Internet prophets parroting these words as if God spoke to them personally. Calling out names is not the point anyway. The point is when these dated prophecies fail to come to pass, the many mouths trumpeting the doom and gloom also fail to take responsibility for the words that clearly fell to the ground. They can't even point to intercession staying God's hand of judgment because their prophecies left no room for His mercy.