I agree 100% with Shooter 2.5's comments about racking the scattergun to scare away intruders -- that's TV-tactics. In real life, being trained by TV will get you dead.
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I agree with both of you. If someone enters your house knowing that you're home and possibly armed, they will probably be prepared to return fire. If you rack the slide on your shotgun you've told them where you are and how you're armed and given away most of your advantages. Worst case scenario is that they immediately start blasting away in the general direction of the sound and kill everyone in the house.
I stated this a few weeks ago and a few FReepers got their panties all wadded up.
It is stupid to give up the element of surprise especially when that and home turf may be about all you have on your side.
The article is well written, useful, and informative in the context of picking out one's first shotgun. I would remove the line cited because it is not 'sound' advice, pun intended. Instead, in the section on home defense, a reminder to familiarize oneself with state laws related to home defense, and receive some training in tactical preparedness would be more useful.