Yep. Crocodiles and Alligators.
And Lions, and Tigers and Bears Oh my.
Truth be told, there are a lot of things you can do to make yourself less of a target. That's the trick is to make your neighbors more of a target (sorry, but reality is that a thief is like water. They usually take the path of least resistance.)
In all fairness, one can make a lot of simple circuits to grab attention if you wanted.
Just off the top of my head, one idea is those motion sensor lights can be much more than a light.
You can splice a wire into the wires that normally go to the light sockets, you can very easily run the wiring behind underpinning or vinyl siding (hidden) to your bedroom or wherever you wish and wire it to a single pole light switch (in case you don't want it going off) and then to a small 110v lamp and buzzer to get your attention. That "security system" is a lot less expensive and probably just as good as most entry level things.
Or instead of running the wires to an unknown light for you, you could possibly run the wire(s) to a metallic object like a window frame or doorknob or something and effectively energize it only when the nearby motion sensor is on.
Not saying that my house is like that.
But also not saying it isn't either.
There are a lot of things you can come up with.
Another really good deterrent is strategically placing plywood with a bunch of nails inside at every access point too. Because we all can't be home every second of our lives either. The reason for putting the theft deterrents inside is so no one gets hurt by accident. And good luck for a thief who broke into someones house and got injured in the process trying to bring civil charges against a homeowner in my town. Jurors would not stand for that.
If a thief or someone wanted in any of our homes, they could one way or another. But don't make it easy for them.
Besides, everyone in my town already knows you don't want to mess with the crazy old indian at the end of the street. He ain't right anyway.
Be creative.
Just stop short of and refrain from explosives That would be for a different topic altogether.
Finally @John A. ,
After all these years of anonymity that last post has finally enabled me to figure out who you are...