Taku, as much as I agree with your argument about the guards being able to kill them, they were immune to damage, im not sure if guards can damage through that, but yeah.
And before people start saying I'm kissing up to the GM's they do make mistakes, everybody does. Nina put a warning in red chat and WC when she accidentally spawned the mobs outside of west, and clearly told everybody to stay away, and apologized.
So we're all at fault as much as the GM making the mistake, whomever it was.