Update: Discussion has moved on to a new thread.
The hiatus is over with today's publication of chapter 73, and the previous thread is approaching the 500-comment threshold, so let's start a new Harry Potter and the Methods of Rationality discussion thread. This is the place to discuss Eliezer Yudkowsky's Harry Potter fanfic and anything related to it.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven. The fanfiction.net author page is the central location for information about updates and links to HPMOR-related goodies, and AdeleneDawner has kept an archive of Author's Notes.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it's fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that "Eliezer said X is true" unless you use rot13.
I was considering more a wizard vs wizard+technology situation. Presumably wizards already figure out ways into charmed houses; the addition of guns just make it easier once you've already located it.
The benefit of a sniper rifle is the range. Harry Potter magic seems to be effective at about a dozen yards at most. The longest confirmed sniper kill is over one and a half miles without any aid of aiming magic; the sound of the bullet arrives about 5 seconds after you're already dead. That should leave you well outside of the range of any anti-apparition wards, and require knowledge of ballistics to even track you to your shooting spot. Lee Harvey Oswald would have gotten away easily if he could apparate or portkey; as it was he was able to walk around for an hour until police were tipped off to his suspicious activity. Voldemort specifically seems to have an odd thing for meeting in the outdoors, and Dumbledore is fond of watching Quiddich. It's not like there would never be an opportunity.
Voldemort met outdoors in a graveyard in the series, once, and that was at a point where nobody but his servants ha any idea he was alive. Secrecy was the Death Eaters' main weapon.
As for assassinating someone like Dumbledore, you could probably do it if he weren't already suspicious enough to take precautions against it, but you could do that with magic as well. Warfare technology would certainly have uses in the wizarding world, particularly for a smart individual, but it's not like any particular combination of technologies and spells is simply uncount... (read more)