On the one occasion where my wife was scared enough to call the cops (ended up as a misunderstanding of a furniture delivery, coupled with a day in which I didn't lock the external door), she retreated to the bathroom which is the farthest room from the front door and the one behind the highest # of other doors. She then called the police from there, locked behind the master bedroom and master bathroom doors. She would prefer to FIRST retreat to that room, locking the doors along the way and NOT have to stop in the bedroom to get a gun out of a safe on the far side of the room. (She is not comfortable carrying in the house on a regular basis due to our small child. Our master bathroom is quite large (14'x8'), and hence ideal as a saferoom of sorts.
You know... the thread was NOT about putting a gun in every room in the house including the bathroom...
This thread WAS about IF I was going to store a gun in the bathroom (as OPPOSED to the bedroom or some other room), what factors should be taken into consideration... all under the guise of the bathroom being used as the SAFE ROOM, putting one more door between a BG and myself (1-front exterior entry door, 2-living quarters entry door (think 'duplex'), 3-master bedroom door, 4-bathroom door).
The idea here is if startled in the middle of the night, retreat one room into the bathroom and then prep defensive measures rather than arm up in the bedroom itself.