Meh. If you talk to anyone who is actually legitimate (NASA scientists, anthropologists [who study Mayans], etc.) none of them will spout this kind of nonsense. I think I'll trust NASA over these people.
http://www.nasa.gov/topics/earth/features/2012.html (Why NASA scientists say the world will not end in 2012 due to a polar switch or any other anomaly)
http://www.huffingtonpost.com/2012/07/08/mayan-calendar-world-will_n_1655135.html (Why the world will not end like the Mayan calendar)
http://www.businessinsider.com/december-21-2012-failed-doomsday-predictions-2011-12?op=1 (Other times people said the world would end and it didn't)