I've seen very little of Malcolm in the Middle, but what I know of fits pretty well with this.

Very good. Not only a frightening fic, but also a lesson on how dangerous improper childrearing can be (though most cases are probably not this extreme).

And the HP reference is funny, too.

lol i this is the only malcomm in the middle / dark knight crossover so i just had to read it.

I really liked it and it totally works !

Intersting twist!

That is BRILLIANT! You should flesh this out into a longer fanfic!

This is both horrifying and fascinating!

I wish you'd flesh it out into a longer fic!

Since the Joker's real name isn't revealed in the movie, this could work!