Muggleborns at Hogwarts. < I really hate the assumption that muggleborns would be all. Like there would never be a jock or hipster muggleborn like real life who would be above this childish stuff. Fun ideas, i'll use them at school.
I must disagree on the "fact" about the dementors. On page chapter one of Harry Potter and the Half Blood Prince, Fudge states "That's right. And they're [the dementors] breeding. That's what's causing all the mist.
I was disappointed about the portraits thing. I guess they are remnents of the past left behind to educate and better the future of tomorrow. Also, I'm glad the hp fact one cleared it up for me on that part!