Is it just me, or is the Guardian's question for a city elf at the Gauntlet absolutely disgusting? I mean, he's trying to guilt you for doing everything you could to protect your friend from rapists. And you can say, "No, Lord Vaughn is to blame," but you can't say that it was Lord Vaughn, his friends, the guards that protected him, and human oppression that was to blame. And if you say that, Alistair says something like "I can't judge you for YOUR mistakes." It's some victim-blaming bullshit.
The companion and guardian reactions are all the same, based on if the PC accepts blame or denies blame, regardless of the question asked. So it does come off grossly victim-blaming when the question is “how could you let your cousin get raped?” Not well thought through at all.
That said, I do think it’s intentional that the Guardian is trying to drag the PC and party members into guilt. Some of the companions comment on how this is a typical of Andrastianism--though their statements are blanket statements of all religion when really they just mean that one, much like many folks in real life :/
Morrigan: Is there any religion that does not thrive upon guilt like a glutton at his lunch? No? I thought not.
Zevran: And now, the self-flagellation? That is what comes next in these things, no?
Shale: It seems that reflection on past mistakes is a constant preoccupation of the religious mind.