Of course all of the demons of the underworld know who Buffy is, and most of them are on a mission to kill her, since killing a slayer is considered a high honor, and something to brag about. No Mr. Blackwell's worst dressed list again ever. Prom dates for each and every vampire cursed with a soul. Soda stuck in the machine - no problem. Only one Starbucks in any given town in the world.
Picket fences a thing of the past as all are pulled up in the name of vamp-slaying.
No more lonely school librarians.