Actually, I call Poe http://rationalwiki.org/wiki/Poe's_Law) on this, if only because it's gobsmackingly poorly written and clumsy in its desire to rewrite the Harry Potter books as evangelical screeds that eliminate the magic witchcraft devil worship and replace it with ideological wars between True Christians and Catholics, other Fake Christians, and, of course, Atheists.
On the other hand, I've read worse fan fiction, so I could well be wrong.
Mom’s Evangelical Christian Rewrite of Harry Potter CANNOT Be Real
Exciting news from the fan fiction world! A writer who claims to be an Evangelical stay-at-home mom named Grace Ann has taken it upon herself to remove all the witchcraft devil-worship from Harry Potter and replace it with a more Christian-friendly message. Looks like someone has finally thought of the children — by stripping a children’s book of the very thing that makes it fun to read.
Oh! I'm going to have to read this later. From what I've started — It's almost too "good" to be true!
Snopes (http://www.snopes.com/politics/religion/harrypotter.asp) hasn't yet noted any confirmation about how legit it is one way or the other.
I read through all of the available chapters, it sounds legit. Or if fake, someone "escaped".
+Suzanne Stewart I've only read the sizeable excerpts in a number of articles, but what I read feels a bit too on the nose to be quite believable. Or perhaps I simply don't want to believe it.
+Dave Hill I think we will be finding out soon enough. Things have a way of either being exposed or validated when they reach a certain saturation point.
So, for the record, Snopes says fake: http://www.snopes.com/politics/religion/harrypotter.asp