I'm a little hesitant to shoot toys at an intruder only to have them return fire with adult bullets. I'll stick with my .45, I think.
Lightfield has been selling these projectiles to law enforcement agencies and wildlife officials for years. Each round is filled with a soft projectile that resembles a koosh ball. They look like toys, because they're made by a Chinese toy factory. The best thing about them is that they aren't likely to kill someone even if they are fired at point blank range. They're so soft that they're almost incapable of penetrating the body.
Learn more about Koosh bullets.