Ah, Wikipedia, the font of true knowledge, my argument is lost, I submit.
But then again, perhaps they do know a thing or two...
Scholars from various disciplines have dismissed the idea that a catastrophe will happen in 2012, stating that predictions of impending doom are found neither in classic Maya accounts nor in astronomy. Mainstream Mayanist scholars state that the idea that the Long Count calendar "ends" in 2012 misrepresents Maya history. The modern Maya, on the whole, have not attached much significance to the date, and the classical sources on the subject are scarce and contradictory, suggesting that there was little if any universal agreement among them about what, if anything, the date might mean.
I`m not sure if I`ve got my facts right, but didn`t a few hundred Spandiards and other assorted Europeans turn up in Mayaland and royally stuff them. The Mayans hadn`t even got round to inventing the wheel for Gods sake, so who in his right mind would give any sort of credence to their "predictions"?