To kick things off, here is a short catharsis-fic I told mckittericks this morning.
After he graduated from Hogwarts, Neville Longbottom became a landlord.
One day, Harry Potter showed up to rent an apartment.
"Hi, Harry!" said Neville.
"Who are you?" asked Harry.
"I'm Neville Longbottom. We were in Gryffindor together, remember?"
"Oh," said Harry. "I've forgotten most of the people I went to school with, because they are not nearly as important and famous as I am."
So Neville rented him the apartment that had recently been condemned because it was posessed by a demon. While Harry lived there, the demon did all kinds of horrible things to him, like breaking his lightbulbs, and cutting off his penis. Neville refused to fix anything Harry complained about.
Then, one day, the demon got bored, so it killed Harry.