There is a large piece of machinery that most american adults own and the presence of which helps burglars determine whether or not you are home... It's called an automobile. Most houses have a button that when pressed will also aide a burglar in determining if your are home... The doorbell. There are also devices installed in your home that help burglars determine if you are home after dark. They are called lights.
The average burglar is not a fiendish lock picking cat burglar that dodges lasers to steal the hope diamond like you see in the movies. They are largely uneducated drug addicts that will throw a brick through your window to get in, steal your stuff, and fence it for pennies on the dollar to buy their next hit.