{The following is Pro-Slytherin and anti-JK Rowling. If this is something you don't think you can emotionally handle, now, is your time to get out.}

Fenrir Greyback is a name that would make any logical person think werewolf. So, what? A wizard had a kid and chose to name it after perhaps the first known werewolf in history (son of the Trickster so I'm choosing to believe werewolf over giant wolf) and that same kid just miraculously happened to get bit by and transformed into a werewolf? Did she even think about this before writing it? How is this even close to realistic? Oh, and let me guess, he's Slytherin too, huh? Because all bad people are Slytherin, right? First of all, just because he's a werewolf and can't control his animal form, doesn't necessarily make him a bad person (hello, Remus Lupin?). Neither does working for Voldemort. He's a werewolf and the wizarding world doesn't seem overly fond of them. That being said, who knows what he was offered (like, for instance, protection) that would gain his loyalty. Also, there was plenty of indecent people who weren't even Slytherin. Is she seriously going to say that every single one of them she had thought about putting in Slytherin or the hat had debated on putting them in my House? Honestly, I've about had my fill of that woman.

{There may be additional rants about JKR's nonsense in the future. Just a warning. I may not remember much about Greyback but this drives me up the wall.}