i’ve considered automated barrier systems that would stop any intruder if they got passed the doors.
of course, ‘they’ wouldn’t like it as it would serve as protection for the occupants
it also wouldn’t be overly attractive, depending on the layout. one design was a 2-3 floor home with the bottom level being circular and mainly serve as the garage and basement. once the home is ‘secured’, an inner wall would move into place. kind of like a can inside a can... whose openings match until you rotate the inner can.
might be a bit nutty, but it would definitely be more secure
Pull up the stairs at night kind of place?
Simple changes in interior architecture can make a home much safer, and protect against home invaders, or even the consequences of a mistaken police raid.
A good solid interior door with secure locks separating the sleeping area from the rest of the house provides an extra element of safety. Anyone entering the home suddenly is still one solid barrier from where you and your family are sleeping. A camera which provides a view of the area on the outer side of the door allows the occupants to evaluate the situation before opening the door.
That door should be very strong, solid hardwoods with a steel inner core is one approach. Such a door can also provide a temporary firebreak in the event of a fire. Of course there should be exit paths which don't require passing through the door, such as window drop ladders.
Similarly, an exterior door which enters into a hallway with strong walls and a second door or gate dramatically increases the safety of the home's occupants in a situation where anyone breaks through the exterior door.
A nozzle that sprayed gasoline across the front porch when the front door frame is damaged would be interesting. Fire a round, officer, and poof you’d go up in flames. Nothing the homeowner can do if you want to commit suicide.