Amen to that SMS! Some crooks intent on quietly gaining access to your house when you have a two story and sleep in the second story and being a sound sleeper was my thought process there. Too much TV I guess! Anyone intent on protecting themselves from mindless thugs and evil hordes will as you suggest have multiple layers of defenses. Ours starts with two dogs.
You have a leg up on me with the two dogs! We had to get rid of our shepherd a few years ago...too many long days with long work hours and the poor thing went nuts at home alone. Someday I'll get another...until then the 'attack cat' will have to fill the gap in that layer, LOL.