I would consider myself in a constant condition yellow, aside from sleeping. That being said, I'm usually up differant hours than the other people in the house so while we're at home, someone is usually up. We have a big german sheppard, and everyone in the home is handy with a pistol.
A little background, for those who care to know...
I recently got divorced, and got the short end of the stick in the deal. I'm due to ship out in March for USMC boot, and since I've been in the DEP so long (I was a tier two, had to do college etc) it was in my best interest to settle. The next closest court date availible would be after my scheduled ship date, which if I missed I would be discharged indefinately, cannot have the divorce open when I leave. She ended up with my apartment, so for the time being I've found myself back here at home.
A little about the house...
Our front door here does not lock. It has been broken into (not by any outsider) more than once, and the whole frame is screwed up. In some instances we use a long 2X4 to wedge it shut, but that isn't often. My ma has taken courses and qualified with her pistol, which she keeps loaded and within reach. My brother, though not here this very moment, is a Marine himself and plenty proficient with firearms. There are no small children or kids in the house. While at home, I've usually got a pistol with me. Say there is a time that I'm on the couch, the can etc and it is not comfortable on my person, it will be on the coffee table/nightstand etc. wherever is readily accessible and not obstructed. We have in fact had incidents where a noise was heard, and upon investigation had strangers turn hide when discovered before entirely being in the house, and one instance (I wasn't home for) when a man decided to let himself in. Strange though it may be, when I go into the shower, my pistol is in there. When I go to sleep, it is beside me. It is never far from me, and I understand some people view this as excessive but I've become accustomed to it and it doesn't really affect/inconveniance me in any way.
That being said, there is no formal emergency plan in my home.
These people's plan could have improvements, back up plans, sure. But I would assume this hasn't happened to them before, and they did not know what to expect. I am sure this was educational, and no matter how intensely you regulate yourself you will never cover every single base, and may just find yourself in the one situation seemingly by chance tailored to defeat your preperations. There is always room for improvement.
My clumbsy dog is the perpetrator for many of the bumps in the night here, and in my particular situation, I may have met this man with a weapon at the ready, not cause I feel the need to walk around my home with an arsenal on my person complete with bandoliers and frag grenades, because one is never far from me and when I move it comes with me. Aside from this, our weapons are kept in designated areas.
I'm always open to suggestions/constructive criticism, I am certainly not the perfect man and someone else's perspective might enlighten me to something I did not see. Just for what it's worth, I feel it's legit some of us are very rarely in condition white except during times we have no choice in the matter.
PS - Congrats to the couple for overcomming this. Glad to hear their plan worked, and they made it through unscathed.
). Nor do I think there is anyone "who really wants to kill me" - personally. 
)