Meh, I was hoping for impostors. Having such a ridiculous prank in the face of Harry's current condition seems pretty callous of Hermione.
Author's response
Truth be told, the entire thing grew out of a single line in Chapter 4, then the 'prank' took off and ran it's self through completion. On FanFiction.net it generated more interest in the fic than the actual story line did. True, in the face of Harry's condition it was fairly callous, but many people liked it as a side story... Perhaps I should have split it off as it's own story, but I didn't and it's too late now.