The fella who called in the other night, who compared the TSA to a locked sliding door on your house... left out one very important facet to complete the picture.
You lock the door, after having abused a neighbor down the road repeatedly, threatening his family and damaging his property while screaming paranoia about how the neighbor was a "danger to us all" because he was a little brown, and maybe had different religious views.
Then, the insufficient security presented by a home lock would seem to make a little more sense.
In the end, the guy locking his house in fear is the violent perp, and is merely projecting his flaws on the neighbor, then sending in the F117s to toss "smart" bombs into his chimney.