A very interesting question really. This topic is not new and so called "false prophets" had since time immemorial tried to predict the end of the world. Remember the famous "Repent, for the end is near" slogan? But to be fair, it does remind people to do good instead of bad, to turn over a new leaf, so to speak. Strangely, almost all the religions in the world preach doing good, no evil, be moral, have integrity, be honest, be loyal, not to be greedy, lustful, gluttony, no anger, no sloth, avarice, no envy, and no false pride. All very excellent advice if one follows the doctrine. What harm can the above good point do? On the other hand, if the opposite is followed, it can not only harm self, but others as well.
If you care to do a google search, there are many pertinent reasons why so many eminent scientist, philosophers, as well as heads of government portray the world is coming to an end if our scarce world resources are depleted by our incessant use. They cannot be replaced. Think of global warming, melting ice caps, flooding, tsunamis, earthquakes, famine, volcano eruptions, rivers drying up, pollution of the air and our water. If the earth's median temperature keep rising as it invariably would, there will come a time when the earth will be uninhabitable. Also with the numerous comets, asteroids hurling past earth, would it not be possible one fine day for the earth to receive an impact so huge that it literally blow the world apart? Strangely, the ancients such as the Myans, Chinese, Egyptians, and others have predicted the end of the world. Seeing so much disasters happening around the world with such rapidity, one cannot feel some fear that the worst can happen, if not in this lifetime, maybe in the next? Keep the date 21/12/2012 in mind. One cannot be not prepared. All the religions exhorts: do good and you will go to heaven, do evil and you know where you will be next. Sound advice taken at face value, can you not be persuaded to do otherwise?
Watch this thought provoking YouTube www.illuminati 2012 End of World prediction conspiracy theory. It is an hour long show and may answer most of your questions in an elaborate exposé. $@ about 7 years ago