One of the stupidest ones I saw, from personal experience, was when the superintendent of my Middle School took over a history class one day to inform us that if a school bully attacks you, and you fight back, you will be suspended/expelled, and the only way to protect yourself from this fate is to passively accept whatever beating the bully offers you by curling into a ball and exposing your back to them.

What a dick! If my children were sent home with a suspension in such a circumstance I would be sure to give them my full support and assurance that they did exactly the right thing.

I may also explain to them that if defending oneself receives the exact same penalty that attacking someone gets it will usually be best to initiate the combat yourself. Particularly if done with no bravado and noncombative body language right up until you strike. Appropraiate places to hit bullies include the testicles, throat, solar plexus, eyes and nose. The nose and testicles are particularly good for humiliating them in front of their peers.