I do not think avoid other-optimizing is one of Eliezer's more helpful memes. In many ways it is a pernicious meme, as it causes people to flinch away from useful other-optimizing.

It was pretty clearly in the class of "look, stop annoying me" posts, rather than a categorical imperative. Unfortunately, it's in the sequences, so has attracted a "how shall we fuck off, oh Lord?" response.