Many people lost their lives, some even committed suicide in fear of the world coming to an end on December 21st 2012, some gave up studying, quit their jobs and moved to safe places, some built bunkers and spent all their money preparing for the doomsday. People realized they just wasted their time and money when nothing happened.
Don't believe in anything you hear, see, watch, read or anything that just goes viral over the internet & TV, don't believe in anything without any strong evidence or statements from the government, scientists or the officials in your country. Live your life, let others live, follow your religion beliefs morals ethics and never panic again. Let peace, harmony, love and care take over the fears, hoaxes and spams like the 2012 Doomsday.