My school had a Dumbledore! He was the elderly principal who was a lovely man, and conducted an extremely good anti-bullying program, but never once thought that some of the teachers might be bullying students, too. He retired when I was in Year 10 and the anti-bullying program went right down the tubes because the new principal was strongly Christian and thought that "telling tales" was wrong and unChristian. Bullying was fine, though, as long as no-one got caught.