I'd like to point out that Hermione stopped smiling 1 year before Harry and Ron did. She probably knew the danger long before them <--- I'd like to point out that Harry stopped smiling after year two and Hermoine smiled year three.
I'm a Pureblood. (And proud of it!) My mom's a Squib. My dad's a Squib. My little sisters a Muggle-Born. My older brother is a Dursley. Most of my friends are Dursley. That is why i am such a Deatheater when i talk to them. I am weird.