That was a very asinine comment there. The Mayans, to some extent, are still around through the current inhabitants of the regions they once lived in thanks to the Spanish mixing blood with the ones they didn't ruthlessly slaughter or give smallpox to just for their fucking gold and to, y'know, Christianize them.

And as for the whole "How can you prove this whole end of the world is hogwash" question, I will put it simply: People have been predicting the end of the world for a very, very long time, since before Jesus. Besides, it really isn't the end of the world according to their calendar. It's actually the end of an age, which means a new one will probably begin, thus negating, really, that the world is ending. They probably didn't have a real chance to come up with more ages past 2012 because of whatever reason, be it the stars weren't yielding what they needed or, y'know, the fucking Spanish bastards.