I think the Mayans just ran outta room on the rock and said "There that's the end of it"
Plus its not like Catastrophes haven't occurred for 1000 years and suddenly we are experiencing them all at once. Its because of the availability of TV and other such modern tech that we know about everything at once.
OSTHEER IS DONE WHEN IT'S DONE!
2012 is one big lie, same as global warming. <secret mode on> it's a way that governments try to raise non-existing threat to get more power < secret mode off>