The psychological side of what this program does.
Just think, if you were a potential criminal at a desperate time in your life, and you decided to break into a home, would you a) enter a home where you think there will be little resistance or b) enter into a neighborhood where you have heard is targeted by this program.
I know one shot isn't much, but all it would take is a few run ins with the new shotguns for the criminals to be psychologically afraid of breaking into any house in that neighbor, even if only 3/10 people are armed.
In my eyes, this is a great, cheap way to help crime ridden neighborhoods.
We'll see how the research goes. I'm excited.