First off good premise and plot. Second, please change your formatting. It's almost like reading one big huge paragraph. Put some space between paragraphs, please.
I thought your explanation for Harry's 'hoolowness' to be very unique and creative. I also enjoyed how he threatened Vernon. The bit with the bowling ball was great, especially when Harry explained where he got the idea from.
Now, I'm very curious about what Moody is going to do with Harry. And I'm also wondering what Tonks is going to do.