You actually sent me back to Netflix and - oh boy I forgot about those pants! Actually I'll go out on a limb and say it's something Willow picked out, as she and Tara wear a good bit of it. (maybe willow picks out tara's clothes as well? This could get really creepy...)

Although nothing will ever beat Willow's "red elmo pelt top" for badness.

I have no idea how this became a Buffy fashion thread but it makes me giggle.