There is a superstition about saying the name of the Shakespearian play "Macbeth" out loud in a theater. Specifically, that it will bring bad luck. It isapparently referred to as the Scottish Play or the Bard's Play in a theater, except during the play itself. Any certain Faerie Queens or vassals thereof have anything to do with this?
Sounds like the kind of thing Lea would do. Celtic lore on the Leanansidhe is that she inspires artistic creation at the cost of madness (and, you know, premature death), and somewhere Jim has stated that she drank the blood of artists (as far as I can remember). Makes me think maybe she had something to do with the 27 Curse among musicians, or what made Lord Byron the whacked-out nutjob he was (for instance, adopting a pet bear because it wasn't specifically banned by Cambridge University after they made him send his dog home, or the various exotic wild animals he gave free roam over his estate, or the "fleet" of toy ships he "commanded" in the open water of the large lake on his estate, or... well, he was just nuts).
The Scottish Play Curse has an origin of dubious provenance among the Three Witches scene, during which, it is said, actual magic was performed originally. Or maybe it has something to do with the fact that Hecate is a character in the play, but most performances leave her character out. The triple-sided Goddess of the Crossroads is, according to Dresden's interpretation of the statuary in Hades's Vault, the current Faerie Queens; perhaps they laid a collective curse on the play for reasons of their own.