"It's because it's a shrine for them, too," said Hermione, bitterly. "It marks both of Harry's defeats, doesn't it? His parents were murdered in that village, and his own death monument is in the garden of their old cottage. The Death Eaters built it themselves, remember? It reminds us all that Voldemort won, killing Harry - his nemesis, the only one fated to be able to stop him - in the process. King Voldemort ... The Defier of Prophecies. The Death Eaters love to ram that message hard down our throats, so they release their choke-holds on us once a year. They think it keeps us in line."