Clear and defined rules on Disguises.

[Vriska]

Characters have never been anonymous during battles unless with an actual disguise (but even then a character could still potentially be recognized), and when asked that has been clarified. So it has always been in effect. Disguises, even before they were mechanical items, have never been foolproof and we've always allowed people to recognize characters that they should know, even if they're trying to disguise themselves.