Yeah... after reading Shadow Zeranion's reply, I have to take some of my assessment back since, funny enough, that was what I originally concluded. Even my last reply was mostly this. Not so much a Monkey Paw situation as, naive girls making naive wishes.
The reason why I said that the Monkey Paw situation 'seems' to be right, was, well, so far all the wishes something bad happens right? Thing is, I was over thinking it and thought in too broadly of the terms, 'good' and 'bad'. Narrowing it by looking at the wish itself... the wish itself wasn't what was corrupted. Monkey Paw situation would be like, well, using xxxHolic where a Monkey Paw was used, wish for rain to happen, the water came from the swimming pool. Wish to have an awesome report... turns out it's the same report written by someone else and now you're accused of plagiarism. That doesn't happen here. Like Shadow Zeranion said, while I haven't thought of it this way, it was due to the girls wishing for what they wanted. Not what they needed (thought of it more like, them lying to themselves on what they really want, and made a wish that appears they had thought would accomplish that goal, when it doesn't even address the issue. Oh, I want people to understand my father more so that we'll be successful and happy. When in reality she just wanted to not go hungry. Or Sayaka healing Kyousuke because she wants him to be happy... no, it's because she wants his dick). The wishes themselves are, 'seemingly' harmless. It's just not the wish that would have given them what they really really 'needed.'
And I also understand Homura more now too. For the same conclusions as Shadow Zeranion as well. Which is what Episode 10 was all about. That being said, can't say what she is doing is helping the situation. What she's doing is basically making Madoka feel like shit as her friends are killed one by one.
Now yes, in Homura's situation, she's basically been giving a shit sandwich and doesn't have a lot of ways to make it taste good. Sayaka refuses to even flirt with the idea that Kyuubee is lying or that the wish was not a good wish. Mami went batshit crazy in one world and almost killed her (which I find funny how this seemed to have turned a lot of people against her. Well yeah. killing your 'partners' if not 'friends' could easily do that. But put yourself in her shoes, she believed she was a magical girl doing only good. And then you find out you turn into the very things you are fighting? My more logical mind might have came to the same conclusion since we all know what witches do to people. And heck, what it does to the entire city if not the world. Course I wouldn't have gone, or attempted to have gone, on a killing spree. But I'm also not juked up on emotions either). And Kyouko was, let's face it. She walks in being a bitch, and probably remained a bitch since she doesn't get the epiphany we get in the 'current' timeline. Doesn't give a lot of time for Homura to buddy up, and probably thought she was as much of an antagonist as well, Kyuubee.
But the way she's going about it, it won't get any better. Not to mention, it appears her time traveling ways... is making Madoka more powerful. Makes me think of Kyuubee going "Just as Keikaku." TL Note: Keikaku means Plan. :3