I had a user ask me how he's supposed to edit a dimension. I asked how he edits text and he returns with "I double-click on it", to which I return "What if you can't double-click, how do you edit it? He had no idea. When I told him to type "ED" and select the object, I think his head exploded.
Same guy also fussed at me one day because he couldn't refedit our XRefed titleblock (I had write permissions removed from certain folders on server).