Most parents will do anything to defend their kids. It’s both a maternal and paternal instinct, and if you try to get in the way of it, it’s likely you’re in for quite the battle, even if you’re in a position of some authority.
One set of parents was shocked when they were called into their son’s school with little explanation. When they arrived, they were herded into the principal’s office and faced with suspension papers. That’s when the dad started demanding answers.
More info: Reddit
