I thought the following were pretty compelling arguments as to why 2012 and The Book of Enoch should not be placed on the same level as the Word of God (I do not agree with every single article on this website but thought their points on these particular issues were succinct):
http://www.jesus-is-savior.com/Wolves/book_of_enoch.htm
http://www.jesus-is-savior.com/End%20of%20the%20World/2012.htm