Not much in the article, but perhaps some might not have been aware there is nearly nothing that will stop a bullet from getting to you in the home.
Cover and concealment in the home could/should cover much more.
I'm guessing here, but most home invasions or illegal entry or even a perp coming thru an unlocked door/window must occur in hours of darkness. The first thing I had to teach my wife was to keep her fingers off the light switch! If you are trying to observe outside the house from inside the house, keep the house dark while lighting up the outside; the perp can not observe you or inside the house when it is dark and with light in his eyes, plus it preserves your "night vision". When I turn in for the night, after checking doors and windows, all lights are off. No "nightlights". What the h*** are those for anyway? In nearly every home, there is enough ambient light from the stove clock to the fire alarm eye to a dozen other gadgets that will allow you to find your way to the BR for those (of us with a bit of age) frequent nighttime whizzes. Just turn on an interior light and the perp will know your location, and, thru a tiny crack in the blinds/curtains, will see you. I tape over some of these pesky little forever illuminated lights such as smoke detectors. If I need light, I have one on my piece. Another night vision tactic is to look approximately thirty degrees away from what you actually want to identify instead of directly at it, in darkness the peripheral vision works better; try it, it works. On the main level bedroom where I sleep I keep a solid steel plate one half inches thick, from the knees up to above my head, with a one eighth inch "vision slot" in it, on a frame that won't tip and on tool box casters, that I can easily maneuver ahead of me thru the entire house. I continue to refine my castle against unlawful entry.