This is a reference to the Evil Overlord List. That's why Harry starts snickering. Indeed, it almost is implied that Voldemort wrote the actual evil overlord list. For the most common version of the actual Evil Overlord List see Peter's Evil Overlord List. Having such a list for Voldemort seems to be at least partially just rule of funny.
Did the evil overlord list exist publicly in 1991? I was actually a bit confused by Harry's laughter here. Eliezer seems to be working pretty hard to keep things actually in 1991 (truth and beauty, the journal of irreproducible results, etc.)
To whom it may concern:
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
(After the critical success of part II, and the strong box office sales of part III in spite of mixed reviews, will part IV finally see the June Open Thread jump the shark?)