I gave the "maybe" response, like I usually do, because I feel both sides of this "debate" are being foolish. Simply put the 2012 stuff has been a subject of analysis for a long time, they were doing "ancient mysteries" type stuff about this since I was a kid. People are simply paying so much attention to this one because of the disasters, and the approach of the date.
The thing is that there is little to nothing normal people can do in such a situation, or else it wouldn't be much of an apocolypse or "end of everything", as such there is little reason to worry to begin with.
The supporters of the idea tend to read too much into random events, those who argue against it are full of just as much disinformation. With so much attention on the subject we have "debunkers" coming out of the woodwork, and really decades ago people were looking at things far more objectively due to the distance of the events and lack of recent events, and seem to have contridicted a lot of current claims.
Overall *IF* the Mayan prophecy is true, it is by definition going to be a supernatural event in overall cause and effect. That is to say that "logic" will have nothing to do with it, despite there perhaps being some effects we can understand to an extent. After all we're dealing with a group of people telling the future, and by definition that should be impossible, especially by their tech level, which raises questions as to how it happened (assuming it did) and if there was some motivation involved on the part of a being sharing that information (if it was some kind of divine intervention), which might explain why it ultimatly had nothing to do with the end of their civilization. I mean if the Mayans believed they were the do all and end all of the world (and keep in mind these guys didn't have ships or colonize very wide area) and asked some divine being (just bear with me, yes I know how this sounds) about the end of the world, an accurate answer, and one that might even satisfy them, would probably have little to do with the end of their own civilization given their general lack of relevence in the big picture.
On top of this, there are questions about the disapperance of the Mayans, that's another whole area of ancient mysteries. People have theories about that, but and there are people claimed to have solved the mystery conclusively, but in reality it's never happened.
The Mayans being one case of the so called "White Effect", that is to say cases where groups of people simply vanish. A famous example would be the Roanoak colony, but through history there have been numerous examples of entire communities just vanishing, and things looking like the people there just walked away or vanished in the middle of what they were doing. There are also cases of individual disappearances that have never been solved when there were individuals of note involved, and countless more of "insignifigant" people vanishing.
The point is that it's more or less irrelevent, the only way we'll know is when the date arises. Overall I'm not betting on the world ending because I'm pretty rational and it doesn't make much sense (and the people against it are right about that). At the same time, there is plenty of wierd crap out there and let's just say that I'm jaded enough where little would surprise me.
The world being a really messed up place though, I kind of expect our end will come (if it ever does) rather unexpectedly, and either with a roar or a whimper a lot of the last people will be thinking "WTF happened".
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