So, random points...
I think a Death Note has infinite pages...
I'm pretty sure it can't create floods, tornadoes, etc.
I was going to say something about being easily corrupted by such a power, but then I remember that even near the beginning, Light didn't just care about killing criminals, he fully intended to kill of lazy/unproductive people once he was done with the criminals. Like, once he realized it worked for real. (at least in the Anime)
