I think the last comment answers the question about Willow and dark magic.

Everytime Willow didn't something wrong, nobody took it seriously, so she got away with worse and worse, until she almost destroyed the world.

I still believe S7 would have been a lot better if she, and not The First had been the 'big bad'.

I've always assumed the sacrificial victim was drugged or hypnotised.

And, though I'd not thought of it before, we know know how those bugs got aboard Babylon 5 don't we?

:-)

kerk