If there's one fandom that always goes above and beyond, it's the Potterheads.
Yes, those fans of Harry Potter can always be counted on to take even the smallest of details from the books and run with them - to the extent that there are now fully-established fandoms within the fandom.
(Is that like fandom-ception or something?! So much meta.)
Quick warning: this post may contain some very mild Harry Potter spoilers.