In helping the latter, I've had to answer some questions which might seem commonplace to any WoW veteran but can be confusing as heck to newbies. Why is the run from Darnassus to Ironforge so unfriendly? Why do animals routinely carry weapons, armour and food, whereas humanoids with no known economy carry cash and cloth? Why does the pattern of night and day follow real time, so players who only have time at night never see places in blazing sunlight? How come a cloth armour merchant can repair my pointy sword? Why, if Alliance and Horde are sworn enemies, is there even a mechanism whereby they can't attack each other?
Some have easier answers than others -- we're not on RP servers, so coming up with plausible explanations isn't too taxing. However, it's almost like introducing a child to a new world. Things which we take for granted can suddenly seem strange and quirky. Obviously, a lot of the less-logical gameplay choices make the game ultimately more fun, if less realistic; what are the weird questions you've been asked by newbies (apart from "gief gold pls")?