Interesting! Really good point. I can't think of a Giles as the Big Bad fic offhand. I know there are a few fics where he's the bad guy, (I just read one the other day) but they're usually pretty blatant basher-fics. IE, Giles is a bad guy by arrogance and trying to control Buffy's life rather than an actual threat.

You make some excellent points though about the way Buffy & Giles are set up in the first episode; I wonder why I haven't read more Evil giles? Maybe because almost everyone likes him?

You don't see a lot of Evil Anya fic either, and she's a canon bad guy.