"Redeemable? Redeemable?" Harry slammed his hand on the Headmaster's desk. Saying he was absolutely angry would be like saying that the sun's temperature was warm-ish.
"Yes, Harry. They can, they must, change. Everybody deserves a chance to be redeemed."
Harry looked at Dumbledore, with an expression of complete confusion on his face. Dumbledore smiled like the grandfather he took great care to look like. Learning to cast wandless, wordless Confundus and compulsions was one of his better and most used tools to use, for the Greater Good, of course.
Harry sat down, and said, almost mechanically. "They must change, and be redeemed..."
"Indeed, my boy, and you will be the one to redeem them. Will you? For your family."
"...Yes... ... I will redeem them..."
"Now go back to your friends, my boy. You have so much to do."
"Yes... I will redeem them..." Harry stood up, and left the office. Headmaster Albus Dumbledore smiled as he watched the young man leave his office.
Had he seen Harry's face, that smile would have crumbled to dust.
All that summer, whole families affiliated with the Dark, and even more importantly, with Voldemort and his Death Eaters, began to disappear without trace.
In a seemingly unrelated note, both Vernon and Dudley Dursley broke their personal weight records...
Turns out, that sometimes, a strong will, a penchant for mischief, natural teenage rebelliousness, a slight resistance to mental magic, a dash of creativity, being raised as a muggle, and simple accumulation of righteous anger can have... interesting effects.
"Um... Harry, my boy... you wouldn't happen to know what happened to the missing persons?"
"I do, Professor. I managed to change them and to redeem them!" Harry seemed chipper than ever.
"What?" Dumbledore's glasses almost fell from his face. "What did you do?"
"Well," the teenage wizard said, with a spark of malicious joy in his eyes, "I studied a lot of transfiguration, I mean, with practice, I managed permanent animate to inanimate transfiguration."
Dumbledore couldn't take his eyes from Harry's green orbs, and he finally realized they were exactly the same color of the Killing Curse.
"By Merlin! You killed them!"
"No, Professor, I didn't kill anybody. I just turned into... this!" Harry took a piece of parchment from the desk, and in a purple and green flash, turned it into a smaller piece of colorful paper.
Harry put the paper in Dumbledore's hands. "I'm sorry, Professor, the offer in this one has already expired. I would need a recent sample to do a valid one."
Dumbledore looked at the paper, not understanding what Harry meant. "What is this, Harry?"
"A muggle invention. A very ingenious one. You see, Professor, when muggles buy stuff in a muggle store, the employees give the customers pieces of paper like this one. On the next trip, the muggle gives this back to the clerk, and get the merchandise at a discount, or get free stuff."
"Then... you..."
"I did exactly as you told me to, Albus, my old man. I changed them. I redeemed them. For my family, as you insist on calling the Dursleys." His smile was scary, Dumbledore could have sworn it actually had an edge. "Aunt Petunia didn't waste any time to get the coupons to the store. Free food!"
Horrified, Dumbledore stuttered, "We must find them and turn them back!"
"Good luck with that, Albus, the coupons are sent back to the makers of the goods, several companies with a workforce larger than the whole population of Wizarding Britain. There are thousands of coupons redeemed every day."
Albus held his head on his hands. "It must be done."
"I wouldn't bother. I think the coupons are shredded after passing through Accounting. To prevent reuse."
"Oh, Merlin, Harry. You have gone Dark."
"On your orders, Albus. And don't bother trying to Obliviate me again. I have already taken the liberty of making a few copies of that particular memory, gave them to several individuals, none of which are any of my very few friends here at Hogwarts, and Obliviated myself of that knowledge. If you try anything, they will send it to several parties, all of them very interested in deposing the de facto ruler of Wizarding Britain. So, Albie. My boy, what you will do about me is simple. Nothing. As always. I will go my merry way and deal with Tom should he manage to get a body again. As always."
Harry stood up, and while a Dumbledore still tried to understand what had happened, he left the office with a last shot. "Don't be like that, Albus. It was... for the Greater Good!"
