"Are you out of your mind?" she asked. "The students make the school; walls don't. The board makes the faculty and headmaster. As far as everyone is concerned, we are taking over this castle. We have no right to be here. Snape isn't Headmaster and you are not employed by the board. Do you seriously think that you are legally anything for this school? Or even Snape? Of course not."
She lowered her voice. "I would watch my tongue. You know nothing about what's out there. People would gladly kill you because of who you are, because of who I am, no question asked. Our job is to survive so we can fix things. Comparing any of the three people in charge with Riddle insults all of us."
Hermione couldn't believe any of this. "And what great crime has he committed? Or your father for that matter? You want the guests there, then you make sure that they know about it, that they are available. You make changes to accommodate them if you want them there, and if you don't want them there, then you don't have to inconvenience anyone."