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!
We live in an area where you really don't need to lock your doors at night, so why do I need a gun? I don't, but I picked up a Mossberg 500 12 gauge today anyway. Just in case that someday comes...
Indeed, it is a scary sound and an affective tool to scare the bad guys away. IF, you are wide awake when the bad guys enter your home.