I think either /rules should be updated to contain all of the current server rules, with a sign at tutorial island suggesting they read /rules,
or a board of all the server rules should be put on tutorial island, as there are rules that are not mentioned at all in game and only on the forums i beleive (X-Ray for one, was asked if it was banned by a newbie and i said yes read tutorial island, to then realise there's nothing there about it)