ETA: There is now a third thread, so send new comments there.
Since the first thread has exceeded 500 comments, it seems time for a new one, with Eliezer's just-posted Chapter 33 & 34 to kick things off.
From previous post:
Spoiler Warning: this thread contains unrot13'd spoilers for Harry Potter and the Methods of Rationality up to the current chapter and for the original Harry Potter series. Please continue to use rot13 for spoilers to other works of fiction, or if you have insider knowledge of future chapters of Harry Potter and the Methods of Rationality.
A suggestion: mention at the top of your comment which chapter you're commenting on, or what chapter you're up to, so that people can understand the context of your comment even after more chapters have been posted. This can also help people avoid reading spoilers for a new chapter before they realize that there is a new chapter.
I don't know about Seamus Finnigan, but:
" "Romantic?" Hermione said. "They're both boys!"
"Wow," Daphne said, sounding a little shocked. "You mean Muggles really do hate that? I thought that was just something the Death Eaters made up."
"No," said an older Slytherin girl Hermione didn't recognize, "it's true, they have to get married in secret, and if they're ever discovered, they get burned at the stake together. And if you're a girl who thinks it's romantic, they burn you too." " -From the beginning of Chapter 42
It would seem to imply that being gay is certainly accepted, so much so that the Death Eaters used the Muggles' homophobia as an argument against them.