"Defence?"
If I conducted home security the way this country has conducted its "defense" these latter decades, then I would routinely break into my neighbors' homes and thrash the crap out of them* just so they wouldn't get any ideas about making free with my goods and chattel.
*(This is not to say that several of my neighbors, or at least the neighborhood itself, might not benefit from a sound thrashing of them, but that's another forum altogether.)
cordially,