Says me.

this nibiru planet, comet or whatever, is referred to under that name by the babilonians, marduk by the sumerians, and hercolubus by idontknowwhoelse (this last term, by the way, is totally unknown to astronomy, not one single celestial body is named like that) and its a constant in ancient legends and old writings

if it were THAT big, wouldnt you think it wouldve been spotted already?

theres also that one picture where you see lots of mathematicians or whatever doing calculations on its size or whatever, does anyone have any proof that thats what theyre ACTUALLY doing?

if it were that big, and if it IS a planet, then, it should belong to another solar system. which would include a star many, many times bigger than this nibiru planet so that it would counterbalance its massive gravity and help it stay put in orbit. a star this big, not known of its existence yet? not known of its approaching to us yet?

and even if, somehow, this fictional planet is randomly floating around space and, somehow, finds the earth and provokes all those earthquakes, death and calammities, and the "salvation" topic is brought up, who are these "nibirubians" to judge whos good and whos bad? what if someone whom they deem is "bad" and is left to perish and die (say, not "rescue" him) decides to change, but does it late?

daring to suppose theres something that acts to save some people and ignore and left to themselves some other ones goes against the simple fact of free will, its just nonsense, and equals to take oportunities away (the "bad" people's chances of reflecting, thinking, and eventually, change)

So, yeah. Says the myth-buster me.