You put a lot more credit on pure-bloods than they deserve. Just because a few snitched to their parents doesn't mean that I, or any other student, was less safe with the good pure-bloods, half-bloods, and muggle borns protecting the school and everyone here. Sure, it put us in more danger than if they hadn't, but so many people would work to protect us, those more aware of the goings of the war.
no subject
But as said, that's the past.