"Either way, you will dissuade most malefactors with a shotgun"
The sound of a shotgun being racked is a sure attention getter.
It is my opinion, if someone hears the racking of a shotgun shell, they are the next to die!
That is for sure. A pump chambering a round is a scary sound hearing it in someone's home at night. The slide action of a semi chambering a round into the chute is equally disheartening. Closing an O/U or S/B/S wouldn't be as intimidating. One guy who lived in the mining towns of CO told me, that if a "bad guy" heard my friend chambering a pump, he'd sh!'!te a brick, and then trip over it scrambing out of the cabin!