Author's Note: This one is less serious than the others...
"I've been getting them all out of the Burrow," [Bill] explained. "Moved them to Muriel's. The Death Eaters know Ron's with you now, they're bound to target the family - don't apologize," he added at the sight of Harry's expression. "It was always a matter of time, Dad's been saying so for months. We're the biggest blood-traitor family there is."
"How are they protected?" asked Harry.
"Fidelius Charm. Dad's Secret-Keeper. And we've done it on this cottage too; I'm Secret-Keeper here. None of us can go to work, but that's hardly the most important thing now."
"I'll say," Harry said abruptly. "You mean, people can act as Secret-Keepers for each other's homes, and hide behind mutual Fidelius Charms?"
"Well, yes," said Bill. "Why wouldn't they?"
"You mean, my father could have been Sirius's Secret-Keeper as well, and they could have both gone into hiding and not bothered with Wormtail?"
Bill had only a moment to look blank before the whole world went blank, as the foundation for the canon plotline disappeared in a puff of logic.
Harry looked around him at the white expanse, snorted, and shook his head. "Third time this month."
"Harry," a blonde girl said severely as she wheedled the scenery back into place, "it's very rude of you to use logic. If you go on like this, we'll never get through wandlore."
"Ariana, I can't help it when the inconsistencies are this ridiculous," he complained, propping an elbow up on a T-posed Ron while he waited for his fellow characters to reanimate. "If Jo wants me to keep a straight face through all this, I demand a raise."