And what if the guy was only pretending to be drunk in order to gain entrance to the house for him and his accomplices waiting outside? Just how helpless are you willing to become due to someone else's error when the lives of your loved ones hang in the balance?
Four men in a car arrived at my place one evening. One of the men exited the car and assertively approached me while holding a piece of paper and speaking spanish, of which I understand only a little.
I was concerned enough that I backed up about ten feet into my doorway before the guy finally stopped. The most innocent explanation for what happened is that the men were lost and the approaching man wanted to show me a written address and ask for directions.
An alternative possibility was that the approaching man intended to tackle me and hold me long enough for his partners to overpower me before I could get back into my house and reach a weapon.
I decided that the risk of the latter possibility was great enough that I had to retreat in order to prevent it. Had the approaching man entered without permission I would have been armed and he would have been bleeding all over my carpet.
There are people who die every day because they are stupid, incompetent, or negligent. I don't intend to let them take me with them.
We have to remember, the bears have learned how to open doors and they do so. They go from house to house until they find an open one and then they go inside.