So, one of the new quests for the pre-cata event requires you to "show your papers" before entering the city. this just sounds a lot like that arizona law where if u dont have ur green card, then it is illegal for u to be in america.
no of course, the wow one is a little more strict, since u have to show ur card, where as in arizona, they probably wont catch u unless u commit a crime, like speeding or gta or something
but even if it wasnt a reference, they are still pretty similar rules =P