What about shooting one of those shotgun shells designed to be a noisemaker?
Lets say you are in your house and hear activity downstairs. Instead of going to clear the house, why not fire a round into the air while in your bedroom with a set of earplugs on?
I know this would give away your position, but if I was a burglar and heard a shotgun go off then I would head for the door without question.
Well then why not just throw a brick of lit firecrackers...the buglar will think you have a machine gun!