Voldemort is playing a very clever game. Declaring himself might have provoked open rebellion. Remaining masked has created confusion, uncertainty, and fear.
J. K. RowlingWhat's that?" he snarled, staring at the envelope Harry was still clutching in his hand. "If it's another form for me to sign, you've got another -" "It's not," said Harry cheerfully. "It's a letter from my godfather." "Godfather?" sputtered Uncle Vernon. "You haven't got a godfather!" "Yes, I have," said Harry brightly. "He was my mum and dad's best friend. He's a convicted murderer, but he's broken out of wizard prison and he's on the run. He likes to keep in touch with me, though...keep up with my news...check if I'm happy.
J. K. RowlingGeorge,” said Fred, “I think we’ve outgrown full-time education.” “Yeah, I’ve been feeling that way myself,” said George lightly.
J. K. Rowling