[Meta] Heredity in Naruto

Warnings:
I suck at arguing (except in the "yelling at each other's head" sense), so I guess I kinda suck at meta. Therefore, this one will be a series of lists of personal opinions and criticism.
Also, it contains mentions of - and arguments sort of in favor of - incest and selective human breeding in Naruto.
This is for hungrytiger11 , who asked for Naruto meta for Christmas, and doesn't care how late I am ~ ♥

(  So I have a few issues with the concepts of hiden jutsu and kekkei genkai, and instead of just ranting against it in my weekly Naruto rants, I've tried to organize my thoughts into something more or less meta-like.  )