I'll feed the newbie troll for you, Rehio.
Quote:
Originally Posted by skyzio
Why would that annoy you? 
I ended up dropping the books as too childish (started trying to read them after chapter 18 of this fic  )... |
The books are childish because, well, they were written for children. I'm not sure why you'd expect otherwise.
Not bothering to read the books from which one is borrowing betrays an arrogance and lack of respect for the source material on the part of the author that many would find objectionable.
Also, perhaps it's me, but I see the story as a thinly veiled commercial for the author's blog/institute, which breaks the "doing this for pleasure and not profit" fanfiction model (as well as being a subtext that breaks the fourth wall for several readers). The author is almost certainly deriving commercial benefit from J. K. Rowling's intellectual property and his exploitation of the popularity of her fandom by routing eyeballs to his site and building his own personal fame as a voice in the field of AI. I wouldn't be surprised if his story has bumped traffic to his blog/website by an order of magnitude or two. In many regards, this practice is worse than a Cassandra Clare or Jim Bernheimer pitching their original fiction novels on their fanfiction sites, since neither author makes a living off their writing.
This story isn't parody in the traditional sense, so it's possible that a court would consider it as not falling within this protected class of derivative works. Indeed, if the legal hammer were to fall on this story, it could have fallout: consider that a single CAD letter, if sufficiently broad in scope, to the owners of fanfiction.net could effectively shut down the fandom.