Sounds like some shaky neighborhoods you guys live in? But i guess you cant be too safe.
Why would the bad guys rob people in shaky neighborhoods, the bad guys rob people in the good neighborhoods and from people that have more than them. 95% of all breakins in my town/city are carried out by bad guys from other towns/cities.
I live in a very safe neighborhood but I still have security cameras and always a gun close at hand when I open the door.