“”This is a commonly accepted fallacy. If you have to “rack” a shotgun you are at a disadvantage already.””
“My thoughts, too. You take away any tactical advantage of surprise by racking a shotgun before you fire. If someone enters your house knowing that you’re home and possibly armed why give them the knowledge of how you’re armed and your position?”
While racking might let someone know what room you are in, it wont tell them WHERE in the room you are (assuming you are not in the same room to begin with), what you might be barracaded behind or how many people there are. In your scenario, he already knows someone is home, I see no disadvantage to letting him know that I am ready, and armed with the deadliest close range weapon available. How does letting an intruder know you have a shotgun put you at a disadvantage? Unless you actually want to kill someone, giving him the chance to bug out in the face of almost certain death is a smart choice.
Someone enters your home knowing that you’re there. Assuming that they are armed and hear the shotgun racked they will either run away or immediately open fire in the general direction of the sound. Tactically it’s a bad idea to give away any advantage that you have.