Bastardization of a Character's Personality

I don't know if you people realize that lots of characters actually have personalities, and you think you just aren't good enough to put that personality into writing, or if you really think that Sakura's a stupid slut, Sasuke throws hissy fits, and Kakashi hates Naruto. Let me just tell you that none of these are true in the slightest, and you people don't just do it to the good guys, you do it to the bad guys too! Kyuubi, according to most Naruto fanfiction, is a perverted funny guy that thinks of Naruto as the son he never had. What. THE. FUCK?! I'm not even sure how many Akatsuki members I've seen find Naruto and raise him for no apparent reason other than a small measure of pity (Actually I've seen all of them except Kakuzu, though he did help him a lot in one fanfiction). I understand that if a person goes through different experiences their personality changes, but you people take all of the depth from a character's personality. I may hang out at the Naruto section, but I'm sure it's a problem everywhere. Dur, me no like Sasuke... he big meanie... I make him stupider than me in story now. If you have seen this happen to any of your lovable characters, good or bad, just talk about it.