Neville was in total disgrace. Professor McGonagall was so furious with him she had banned him from all future Hogsmeade visits, given him a detention, and forbidden anyone to give him the password into the tower. Poor Neville was forced to wait outside the common room every night for somebody to let him in, while the security trolls leered unpleasantly at him.
“Is it true that you shouted at Professor Umbridge?” “Yes,” said Harry. “You called her a liar?” “Yes.” “You told her He Who Must Not Be Named is back?” “Yes.” Professor McGonagall sat down behind her desk, frowning at Harry. Then she said, “Have a biscuit, Potter.”
And all along the corridor the statues and suits of armour jumped down from their plinths, and from the echoing crashes from the floors above and below, Harry knew that their fellows throughout the castle had done the same.
“Hogwarts is threatened!” shouted Professor McGonagall. “Man the boundaries, protect us, do your duty to our school!” - Harry Potter and the Deathly Hallows, page 602