I'm with DavidS re: Willow. She liked the power, sure, but once Buffy was gone, she had no choice but to use it. She became the "Buffy" of the group.

This is interesting, Willow's been shown to have power equal to Buffy's but consistantly no mentor like Giles. I think after season 5, Buffy would have totally ready for coping without Giles, apart from the being raised from the dead thing. But he was there through her formative high schooly period, helping her not to do a Faith. Every time we see Willow doing magic it's alone, or with teenagers(and not fantastically sensible teenagers at that.) Giles continuously offers "slow down" as his only piece of advice, he's got so many issues with magic he doesn't really take up the mentor role. It's interesting to wonder whether Jenny could have done that if she'd lived.

Where I'm going with this, is sort of a defense for Willow. I think virtually any character on the show at her age, gifted with huge power and no one older to give support, would have done dark things in their own way. Willow's way is pretty creepy, but I don't think Buffy would be doing any better without Giles.

Willow was the same with her brain power. Anyone remember "DELiver" - to Cordy and Harm, from season 1? Not saying they weren't bitches to her, because they were, but...

I don't think Willow's responsibility should be shuffled off on Giles. Buffy was given a power she didn't ask for, and told she had to forsake a normal life, to save the world, repeatedly. Willow pursued a power because she was interested in it.

From the script:

Tara gets up - goes to the bookshelf across from them.

TARA
What happened to "History of Witchcraft?"

Willow sits up, alarm and guilt rising.

WILLOW
I - it isn't there?

Tara shakes her head, turns to Willow - concerned.

TARA
Dawn must have taken it.

WILLOW
What? No, she didn't. She did?

TARA
That book has a whole section on resurrection spells. (worried) This is bad. This is really bad…

Now Willow looks worried too. And regretful.

WILLOW
But it's just a history book. It might answer some of her questions - but it's not like she could do any harm with that stuff. Could she?

TARA
It doesn't have a "how to" guide, but it refers to specific resurrection spells and potions.

Willow stands - fully freaked.

WILLOW
I didn't- I mean, hey! How'd she know that?

TARA
I don't know. But she could get into major trouble with that information. (looking around) God. What else did she take-

WILLOW
(too quickly) Nothing.

Tara gives Willow a look - how would she know? Willow starts to ramble nervously-

WILLOW
I think. I think she took nothing else but maybe she did and we should look, because who knows? I don't.

TARA
No. We can't waste time on that now. Who knows what she's up to…

Willow takes this in - dread rising.

WILLOW
We need to call Buffy. Now.

re: the script - so clearly Willow doesn't intend or expect Dawn to use the spellbook to raise Joyce.

Willow pursued a power because she was interested in it.

Well, it's not like she pursued that power in the face of resistance from those around her. Minus Giles' very mild suggestion in Becoming that maybe the Big Power was not such a good idea, Oz was the only person who said anything before things went really off the deep end. And she was in a shinysparkly new relationship with a woman who says explicitly that the first thing she was attracted to about Willow was her power.

I'm pretty sure the book that Dawn was using was the one she stole from Giles. That was the one clearly labelled as dangerous, and why steal it if it doesn't play a part in what happens next?

I totally think Buffy would be dark without the influence of not only Giles, but also her friends. Buffy in WSWB could have easily turned into Faith (Faith had just seen her watcher killed, and the bad guy was going to do worse to her). I think it was Xander's "I officially don't care" that snapped her out of it.

I'm pretty sure the book that Dawn was using was the one she stole from Giles. That was the one clearly labelled as dangerous, and why steal it if it doesn't play a part in what happens next?

As the script makes clear, the book that Willow nudges towards Dawn is not a "how to" but it lists specific spells which work. From that, clever girl Dawn, goes and finds the how-to instructions among Giles' books. After that she sees Spike, sees Doc, procures the eggs, does the spell.

Yeah, I'd forgotten the lines, but I was pretty sure Willow never intended the book to be used in the manner Dawn used it.

Stoopid monks making me remember everything wrong.

Feh. They've dissappeared whole episodes from my brain.