Wow - over 25% home invasion rate in that neighborhood. Who would attack these people, including a WWII veteran, and spray paint graffiti gang signs everywhere inside the house?
Great idea about arming those people, though I disagree about racking the slide to scare intruders off. If the chamber was already loaded like it should be you just ejected a live round in an already low capacity weapon. If it wasn't already chambered it should have been ready to shoot and fully loaded with +1 already in the chamber. And racking the slide gives away your status and position before you can shoot - information you might not want the intruders to know. If you have more than 1 invader, and some are probably armed... 2 or 3 or 4 invaders and you have only 4 or 5 shell capacity in that 20 guage shotgun... I prefer a larger capacity rifle or handgun.