Oh yea, it was mostly an agreement and add on.\
Getting shot with rock salt is no fun, though
I've not had to do it, but personally IMO, if you have to fire a gun due to self defense, I'm not a fan of less than lethal rounds. If things have gotten to "I need to fire a gun" it's buckshot where I'm at. But you say firing a shotgun in enclosed space will dissuade home invaders...
I think just the racking of a shotgun will do that. There are few sounds in the US that I think are as distinctive as a pump action shotgun being racked. Nor one that instills brownpants syndrome.
It's impossible to tell /s