I go along with racking the slide in my situation for a couple of specific reasons.
My stairway is an excellent defensive position, narrow with good concealment at the top, and a good open kill-zone at the bottom. It would be very tough to try and attack up the stairs, and even if someone was able to make their way up the stairs, they are then in another kill zone from our master bedroom. Also, due to the way the angle is at the bottom of the stairs,it would be very dificult, if not impossible to shoot up the stairs without exposing more of yourself than the person up the stairs. Doesn't sound right or possible, but you would have to see the layout to understand it.
I have no intention of ever trying to clear my house myself, or even with the help of our German Shepard, so I plan to defend the upstairs portion of the apt untill the police arrive to deal with the invaders, or better yet take a police report. I say that because I would prefer the intruders take what they want from downstairs than for me to have to shoot them. But thats just me, I would prefer not to have to kill someone over a $300 TV. However, if someone tries to make it up my stairs, than I will consider that to be an attack on myself and my wife, and will respond accordingly.
So as to "encourage" the intruder to leave my home as promptly as possible, and inform them that it is the wrong home to enter, I rack the slide as soon as I leave the bedroom. I would probably add in some obscenities to further make my point. All the while my wife will be on the phone with 911. If the badguys leave, they can deal with the very quick response time we have here (seeing as we have a police community center that is usually staffed with 2 officers on our property, less than 200 yards away, not to mention the County Sheriffs office only 2-3 miles away down our street), they can stay in the house and be arrested by the same officers, or they can try and attack up the stairs.
While I would prefer to not have to deal with the hassle of replacing photos, electronics and trinkets, thats what my insurance is there to cover. I would rather deal with my insurance carrier than have to shoot an intruder.
Thats why I give them the warning.
I.G.B.
BTW. The last time we called the cops (which was for a suspected break-in), the first officer was on scene in less than a minute, and several others were there not much after, including one of the K-9 units, with one of the biggest GSDs I have ever had the pleasure of meeting.