Very true. On a related note, does anyone have any theories for why Mab hasn't given Harry a way to know what Winter Law is before he breaks it?
I wish I had a good answer for you, but I only have another question which might lead to an answer. Do you remember the name Tam Lin? (According to Wikipedia, also a lot of other names.) Mab mentioned him after Harry flash froze a sidhe noble at his birthday party in Arctis Tor. Mab's exact words were:
"No one has lifted a hand to them that way since the days of Tam Lin." This strongly suggests Tam Lin was the Winter Knight back in the day.
I've read a wiki article about Tam Lin. It mentions the fae were after him, I think they were going to sacrifice him. From what I read I pictured the Wild Hunt was after him. A mortal women hides Tam. There's a lot of shape shifting involved in keeping him hidden from the fae but eventually he escapes. I'm thinking that in one of the poems or stories about Tam Lin there might be a clue to the Winter Law Mab might want to keep hidden from Harry.
Looking over the wiki article, there are many people who have used the character of Tam Lin in their own stories and there was even a movie made in 1970 titled:
Tam-Lin, also known as
The Ballad of Tam-Lin,
The Devil's Widow and
The Devil's Woman. It was directed by Roddy McDowall and it took place in modern London of 1970. (Sort of an Austin Powers version of a spooky fairy tale.) From reading a review on IMDB, Ava Gardner played the Fairy Queen, though from looking at the movie poster, her character may have more in common with Lara Raith than Mab. The point I want to make is; for all we know Jim might have seen this movie on some late night cable channel and lifted an element from the movie to create a Winter Law or two. (I never even heard of this movie before I read the Wiki article.)
If anyone has read the original poem or song of Tam Lin, that might be a good place to look for clues.