The same reason there is a law against vigilante justice. In many individual cases it's probably ethically justified but I certainly support a general rule against it.
I don't think we do have a well documented rule forbidding it to have multiple accounts.
I don't have any additional accounts, but in case I would wanted to post something on LW which I wouldn't wanted to have associated with my real life identity I wouldn't think it as rule breaking if I would open an account for that conversation.
I don't think we do have a well documented rule forbidding it to have multiple accounts.
I don't think we have well-documented rules, period. About the only explicit policy statements I can think of are the one forbidding advocation of violence and now the one interpreting block downvoting as harassment, and those were both posted as normal articles (and thus quickly buried). The FAQ talks about etiquette, but presents very few unequivocal guidelines.
There's a couple other actually-enforced norms I can think of, like "don't talk about the Thought-Experiment-That-Must-Not-Be-Named", but those are even less explicit.
My stupid fanfic chapter was banned without explanation so I reposted it; somehow it was at +7 when it was deleted and I think silently deleting upvoted posts is a disservice to LessWrong. I requested that a justification be given in the comments if it were to be deleted again, so LessWrong readers could consider whether or not that justification is aligned with what they want from LessWrong. Also I would like to make clear that this fanfic is primarily a medium for explaining some ideas that people on LessWrong often ask me about; that it is also a lighthearted critique of Yudkowskyanism is secondary, and if need be I will change the premise so that the medium doesn't drown out the message. But really, I wouldn't think a lighthearted parody of a lighthearted parody would cause such offense.
The original post has been unbanned and can be found here, so I've edited this post to just be about the banning.