Well, as much as I'm concerned the only real rules that apply are the rules of the games you agreed to respect when you created your account.

There is no such thing as etiquette, any infraction to the rules are to be reported to a GM and any "gameplay conflict" is to be settled by kick or abbandon vote.

Any other "rules" have no worth nor weight and can't apply as anything but your personal point of view that don't overwrite other players own point of view on how the game is to be played.