It is an interesting case. The Social Contract prohibits insults/abuse between players. It is not specific on where the abuse occurs. While it would be ridiculous to think that the Magistrates can police the entire world, if one player is harassing another about BattleMaster events/issues, regardless of the medium, do we have a responsibility to take action on that? Facebook does have its own controls, though, and that kind of interaction is trivially easy to block there.
... one of the Magistrates has been muted.
That was a mistake which has been corrected.