Less lethal weapons in the home
All I have to do is give you a ballistics demonstration in a modern home to show you how dangerous it would be to fire off a 9mm round and at what point it would actually stop. That modern construction may be efficient in keeping the cold out, but an exacto-knife and a hammer can get into your home faster than the big bad wolf could huff and puff and blow your house down. Many police departments moved from the MP5 to the M4 Carbine because of penetration issues and I would highly recommend people consider using a Carbine or shotgun instead of handgun caliber weapons. One shotgun blast of size 4 shot can do an awful lot of damage in short ranges and the liabilities of bullets going astray and hitting neighbor are very limited.
I have seen ballistics testing where an M4 Carbine with frangible ammo penetrated less than a 38 special and if you live in a home with other people. Missed targets mean unstopped bullets. I would not hesitate to tell people to consider less lethal weapons in their home. You can use a gunvault gun safe to hide them in for the same reason you might want to lock up your guns. Being on a second floor and spraying mace or pepper spray down the stairs is enough to prevent an attacker from coming up and a taser can easily fit into a gun safe. Why not think about less lethal weapons, hide them in various points in your house for the what ifs and hide them in something like a gunvault microvault or minivault.