I will note that the rule I intended was not "no Less Wrong moderator shall ever be involved in a conflict with another human being". Crucial details of the present situation are that (1) SilasBarta is himself a prominent and respectable member of the LW community, with exactly 7700 karma at the time of writing; and (2) Alicorn's issue with him originated on LW and predates Alicorn's being made a moderator.

So we're not talking about a situation where e.g. some troll with a longstanding feud with EY from outside LW comes onto the site to make trouble.