Bingo - and probably without alarms.This guy looked for houses without dogs.
Frankly I think most people (without alarms or dogs) would not wake up until it's too late. I have two kids and I can tell you there have been nights when I didn't know my 2 yr-old crawled out of the bed and walked into the other room (she often sleeps in our bed with us) -and she isn't exactly a ninja as she's crawling out of bed. On top of that, it usually takes me a second or two to clear my head if someone wakes me up in the middle of the night. One time, the same 2 yr-old fell off the bed at 2AM and after I sat up it took me a moment to look around and say 'WTF was that?' I think you'd have to be a light sleeper to know when someone is in your house. Probably only you guys with a gun under your pillow would have a chance.
I think the best defense is a good offense, like a good alarm system and solid doors/locks....and a nice big dog would be good too. (Yes - a firearm goes without saying.) We used to live on the 2nd floor of a 2-family, so a burglar would have to breach a minimum of 2 doors to get in. Front door was very conspicuous, right off the street, and at the top of the stairs was a second locked door. Back door had glass, but there's a second door at the top of the stairs plus a THIRD pantry door between it and the kitchen - all of which were always locked, even during the day. I felt that was one of the safest places we have lived.
I'm stunned when I hear there are towns out there where people leave their doors unlocked.