I always used to say that if any BG could get in the house without killing himself on all the crap my kids used to leave laying on the floor, well, he's a better man than I am. And if he's barefooted and can withstand the Legos and barrets, well any gun won't work against him anyway.
Now the kids are grown, so in such an encounter, the only thing I have to do is protect the hallway where the bedroom doors are, and I can basically do that from my bedroom door. I'm not going into the front of the house and anything that's in the front of the house (living room, kitchen, laundry room), they can have.