"Except some keep rats as pets, and you'd never keep a Darkspawn as a pet because there's no good to be found in them at all." Rats. Why rats? Why not... roaches, or spiders, or anything that doesn't have sharp bitey teeth?

"And part of joining the Wardens involves gaining a certain immunity to the Blight, but it's not without side-effects. We'll never become Darkspawn ourselves." As long as they die instead of going too long.