First: Ember that's hilarious!<br/><br/>Second: While perusing the Fidelius Charm wiki page, I came across some interesting information. The reasoning that Rowling used for the death eaters knowing where Grimmuald Place was is because they knew Harry had inherited it from Sirius and it was between 11 and 13. There's also that everyone who was told about it became secret keepers and could reveal the location to whomever they pleased.<br/><br/>As such, how I would like to continue is that those who<em>haven't</em>been under the fidelius charm for the past few months do not know that the charm on Voldie's name is not powerful enough to bypass the fidelius charm. However, Draco (as he was working for him) and everyone not a student, knows that the fidelius charm is powerful enough not to reveal their location. :D