I keep a Judge on the nightstand with those triple defense rounds. One trigger pull= a .410 slug followed by two .30 cal balls. In a half awake state, I figure it's my best bet. My 9mm I carry around ( not unusual to have $10k+ on me for work reasons) gets plopped on the coffee table. No kids in my house, just the wife and I. But I'm really starting to think pepper spray is where it's at.
Sure, you hear the (rare) horror stories of some dude jacked up on something and only the manliest of manly rounds could stop his warpath. But for a run-in where you just really need someone to go away...a squirt of pepper and every gets to go home seems like a damn good idea to me. Cures the bullets through the walls you mentioned, and doesn't blow out your eardrums in the process.
I think hunters who butcher game have a different appreciation for life. I got no qualms about harvesting an animal for food. General public doesn't either, but grocery stores and fast food joints insulate them from the ugly part of the food chain they live in. I feel a bit of hesitation when aiming at a squirrel I plan on eating, but I realize it's part of life. The idea of taking a life is supposed to be unsettling. Occasionally you get that random muscle twitch when skinning something, or the game is still warm, that just further drives home the reality that you just ended a life.
If more people felt that little pang of guilt that a hunter feels when harvesting an animal I think the absolute horror of killing another human being would really sink in and guide their actions. It's not hunters that I worry about as some gun toting maniac. It's those folks that get joy from racking up points and awards for killing folks in video games. Killing something is supposed to feel bad, not train your brain to trigger a reward response. Man, that's a scary thought.
I'm not shitting on gamers. Just saying. Walking around carrying lethal force isn't really a warm and fuzzy feeling. Honestly, it's kinda gross. Gotta look out for your own, though.