Actually, people should keep a stuffed dog just inside the door. The cops will first open fire on the dog, alerting the residents to the incursion.
LOL Filing that under 'jokes that are actually good ideas.'
Add some strategically placed hidden speakers and an audio track of a very vicious sounding dog/s. When the stuffed dog is shot it triggers a program that plays the snarling dog/s coming from alternating speakers. Keep the invaders turning this way and that for a little bit.