... like boxing with children.
Here's the deal. It's a story. Given the completely artificial framework that we're in, Udon really might beat Itachi, as it's been said so frequently. There is nothing inane about Naruto beating Itachi, unless you can point out in the framework of the story something to the contrary. There's really nothing you can say about anyone beating anyone, because as Kishimoto is apt to allow for, the underdog is generally the victor. No one's strength has been absoluately measured, nor will it; it's a story.
That any of this could get your backs up this much proves many things, and most of them I don't want to air here. Just have fun, speak rationally, try to back up what you say, AND DON'T TYPE IN CAPITALS. (It doesn't do anything but make you look dumb.)
-xtortout