Actually I think its kind of sad that crap like this overshadows the Mayan ability to calculate a 53,000 year calendar.
Several ancient societies were possessed of very impressive astronomical skills. It does give me pause that there is some indication of a periodic difficulty associated with astronomical phenomenon, roughly on a 3,600 year cycle. Asteroid belt, comets, not at all sure since the distinction was not exactly made by them. But, there’s something to it. I’ve begun to seriously consider that some elements of Biblical prophecy are in relation to the same event(s).
So, while I don’t go for the whole Mayan long count calendar, December 12, 2012 thing as as some do, I won’t completely discount it as nonsense, either. They knew a few things that weren’t understood by us until recent decades.