It doesn't take a genius on the level of Voldemort to transfigure a hundred pounds of bleach (or name your poison) into air and release it inconspicuously in Diagon Alley.
It kind of does.
It really doesn't. They teach transfiguration to the children from about 8 years old and some of them do not completely fail. They tell the students a bunch of things that are really dangerous to do. There are many people below the level of Voldemort who have both the knowledge and skill to kill people effectively with transfiguration if they so desire. It really isn't that much of a genius feat of creativity.
In how many fanfics is anything like this suggested?
Relatively few fan-fictions are based around the crude exploitation of basic magic for the purpose of terrorism. This says a lot more about what makes a good story than about how hard it is for average wizards to play terrorist. Significant plot arcs about magical terrorists sound cooler if they use fancy dramatic magic that sounds mysterious and hard to acquire rather than the simplest thing that would work.
They tell the students a bunch of things that are really dangerous to do.
They go further than that: the standard textbook includes a horrifying animated photograph of a murder victim. The idea that Transfiguration can be used as a weapon is taught in the very first class session.
In the wood-shop class which I took when I was a year or two older than a Hogwarts first-year, we were taught that the tools are dangerous. We were taught that you can cut your arm off with a bandsaw if you behave foolishly near it; and that if you lower the drill on the drill-p...
(The HPMOR discussion thread after this one is here.)
The previous thread is over 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 latest chapter as of 09/09/2011 is Ch. 77.
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, eight. 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: